{"id":3930,"date":"2026-05-11T10:20:23","date_gmt":"2026-05-11T01:20:23","guid":{"rendered":"http:\/\/kyotofusioneering.com\/kfwp\/?post_type=news&#038;p=3930"},"modified":"2026-05-15T09:17:45","modified_gmt":"2026-05-15T00:17:45","slug":"behind-the-fusion-scene-tomoya-yokoi","status":"publish","type":"news","link":"https:\/\/kyotofusioneering.com\/en\/news\/2026\/05\/11\/3930","title":{"rendered":"Behind the Fusion Scene: Tomoya Yokoi"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/kyotofusioneering.com\/kfwp\/wp-content\/uploads\/2026\/05\/Yokoi-san_JP-1024x576.png\" alt=\"\" class=\"wp-image-3921\" srcset=\"https:\/\/kyotofusioneering.com\/kfwp\/wp-content\/uploads\/2026\/05\/Yokoi-san_JP-1024x576.png 1024w, https:\/\/kyotofusioneering.com\/kfwp\/wp-content\/uploads\/2026\/05\/Yokoi-san_JP-300x169.png 300w, https:\/\/kyotofusioneering.com\/kfwp\/wp-content\/uploads\/2026\/05\/Yokoi-san_JP-768x432.png 768w, https:\/\/kyotofusioneering.com\/kfwp\/wp-content\/uploads\/2026\/05\/Yokoi-san_JP-1536x864.png 1536w, https:\/\/kyotofusioneering.com\/kfwp\/wp-content\/uploads\/2026\/05\/Yokoi-san_JP.png 1920w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>In a nutshell:<\/strong><br>Tomoyo joined Kyoto\u00a0Fusioneering\u00a0(KF) as a fuel cycle engineer in October 2023, bringing\u00a0expertise\u00a0in both chemical engineering and construction management. After studying chemical engineering at university, he spent several years overseeing the design and\u00a0construction\u00a0management of\u00a0high\u2011rise\u00a0buildings and semiconductor fabrication plants at a contracting firm.\u00a0At KF, Tomoya\u00a0leverages\u00a0his\u00a0experience\u00a0to develop\u00a0measurement instruments\u00a0used in fusion fuel cycle systems and\u00a0to\u00a0design\u00a0layout and equipment specifications for fusion facilities such as UNITY\u20112.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong><strong>Could you tell us about your role at Kyoto Fusioneering (KF)?<\/strong><\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">I work on a team developing&nbsp;fusion fuel cycle systems&nbsp;in the Plant Technology Division.&nbsp;My responsibilities include&nbsp;the construction of measurement instruments as well as&nbsp;the&nbsp;&nbsp;design&nbsp;of equipment and facilities.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Specifically, I develop instruments used to measure the concentration of hydrogen isotopes\u00a0&#8212;\u00a0the fuel for fusion\u00a0energy\u00a0&#8212;\u00a0as well as radioactive levels and impurities contained within the system. These include tools such as Raman spectrometers, gas chromatographs, and ionization chambers.\u00a0I\u2019m\u00a0also involved in\u00a0the\u00a0equipment and building layout design for UNITY\u20112, an integrated fusion fuel cycle testing facility\u00a0currently\u00a0being built by\u00a0<a href=\"https:\/\/ffc.inc\/\" target=\"_blank\" rel=\"noreferrer noopener\">Fusion Fuel Cycles,<\/a>\u00a0a joint\u00a0venture between KF and Canadian Nuclear Laboratories (CNL).\u00a0<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong><strong>How is the development of UNITY<\/strong>\u2011<strong>2 progressing on the ground?<\/strong><\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Given the entire UNITY\u20112 system must fit inside an existing building owned by CNL, construction has been quite complicated.&nbsp;While designing the plant, we rigorously verify equipment size,&nbsp;installation methods, and performance&nbsp;requirements&nbsp;&nbsp;to&nbsp;ensure it aligns with&nbsp;the&nbsp;facility\u2019s&nbsp;original dimensions.&nbsp;We also carefully consider the space needed for transportation, installation, experiments, and maintenance.&nbsp;It all requires&nbsp;precise calculation&nbsp;and&nbsp;creative problem-solving.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Another challenging area is the design of&nbsp;glove boxes,&nbsp;sealed&nbsp;enclosures equipped with rubber or resin gloves that allow operators to&nbsp;safely&nbsp;handle radioactive&nbsp;materials.&nbsp;Designing the interior so that all necessary components are within arm\u2019s reach is particularly complex, often requiring repeated fine adjustments\u2014sometimes down to the millimeter\u2014to&nbsp;finalize&nbsp;the design.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">While the work can be demanding, it is incredibly rewarding&nbsp;to&nbsp;build&nbsp;systems that have never existed before&nbsp;with your own hands.&nbsp;This is what makes engineering&nbsp;truly exciting&nbsp;and&nbsp;satisfying.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong><strong>Have you always been interested in engineering?<\/strong><\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">My parents worked in the architectural field, so I was interested in building things from a young age.&nbsp;I initially considered majoring in architecture at university, but a structural falsification scandal at the time had a major impact on the construction industry. That prompted me to reconsider my path and&nbsp;ultimately choose&nbsp;to study chemical engineering instead.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">I felt that chemical engineering would allow me to realize my childhood desire to build&nbsp;something&nbsp;&#8212;&nbsp;just through a different approach:&nbsp;scaling chemical reactions from the lab to a&nbsp;full\u2011fledged&nbsp;chemical plant.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Through my coursework at university, I gained a wide range of knowledge in areas such as reaction and process engineering. However,&nbsp;my mindset began to shift&nbsp;once I&nbsp;entered&nbsp;graduate&nbsp;school,&nbsp;and my days became consumed by research.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In my graduate lab, we\u00a0operated\u00a0under the hypothesis that the human body is the most efficient chemical\u00a0plant in existence,\u00a0conducting basic research to uncover the reactions taking place within it. While the work was intellectually stimulating, it often took years to obtain tangible results, and it made it difficult to feel like I was moving forward.\u00a0That\u2019s\u00a0when I realized that I was better\u00a0suited\u00a0to being an engineer rather than a researcher.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When job hunting, I intentionally focused on companies where I could be directly involved in engineering activities such as design and construction, rather than research alone. In the end, I joined an\u00a0HVAC\u2011focused\u00a0construction company whose culture felt like a good fit.\u00a0<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong><strong>What kind of experience did you gain at the HVAC company?<\/strong><\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">At the company, I worked on the design and construction management of&nbsp;high\u2011rise&nbsp;buildings and semiconductor fabrication plants in Tokyo. In the construction industry, you learn a lot by working onsite and seeing things for yourself.&nbsp;So,&nbsp;I actively took on a wide range of tasks&nbsp;early on&nbsp;to build this on-the-ground experience.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">I also volunteered for difficult construction&nbsp;challenges&nbsp;that others tended to avoid or&nbsp;deprioritize&nbsp;due to the workload.&nbsp;At first, I often hit roadblocks since there were many things I&nbsp;didn\u2019t&nbsp;understand.&nbsp;However, with guidance from senior colleagues and partner companies, I gradually worked through these challenges,&nbsp;gaining invaluable experience along the way.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Over time, I found\u00a0there were\u00a0more things I could handle on my own,\u00a0and I truly felt myself growing as an\u00a0engineer.\u00a0I also worked harder than most of my peers, building my knowledge and skills one step at a time.\u00a0This gave me\u00a0broader exposure to the industry and built my confidence as an engineer.\u00a0\u00a0During this time,\u00a0I was\u00a0driven\u00a0by the sheer satisfaction of creating something,\u00a0and I often found myself completely absorbed in my work.\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At&nbsp;the same time, there were moments when my eagerness to&nbsp;take on as many tasks&nbsp;as possible&nbsp;pushed me to my physical limits,&nbsp;and I nearly&nbsp;burned&nbsp;out.&nbsp;Even so,&nbsp;I was able to ask my teammates for help instead of carrying everything on my own.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In particular, the experience of&nbsp;advancing&nbsp;projects&nbsp;with the support of senior colleagues&nbsp;in&nbsp;my&nbsp;first year of&nbsp;university&nbsp;became&nbsp;the foundation for&nbsp;later&nbsp;leading&nbsp;multi-billion-yen projects&nbsp;as a site manager.&nbsp;It also taught me firsthand the true value of teamwork.&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"1080\" src=\"https:\/\/kyotofusioneering.com\/kfwp\/wp-content\/uploads\/2026\/05\/Yokoi-san_interview.png\" alt=\"\" class=\"wp-image-3926\" srcset=\"https:\/\/kyotofusioneering.com\/kfwp\/wp-content\/uploads\/2026\/05\/Yokoi-san_interview.png 1920w, https:\/\/kyotofusioneering.com\/kfwp\/wp-content\/uploads\/2026\/05\/Yokoi-san_interview-300x169.png 300w, https:\/\/kyotofusioneering.com\/kfwp\/wp-content\/uploads\/2026\/05\/Yokoi-san_interview-1024x576.png 1024w, https:\/\/kyotofusioneering.com\/kfwp\/wp-content\/uploads\/2026\/05\/Yokoi-san_interview-768x432.png 768w, https:\/\/kyotofusioneering.com\/kfwp\/wp-content\/uploads\/2026\/05\/Yokoi-san_interview-1536x864.png 1536w\" sizes=\"auto, (max-width: 1920px) 100vw, 1920px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong><strong>What prompted you to consider moving to Kyoto Fusioneering?<\/strong><\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The trigger was a message from&nbsp;<a href=\"https:\/\/kyotofusioneering.com\/en\/news\/2023\/03\/01\/1242\" target=\"_blank\" rel=\"noreferrer noopener\">Yoshinao<\/a>, the Head of the Fuel Cycle Department at KF,&nbsp;who&nbsp;I have known&nbsp;since my university days.&nbsp;Out of the blue, he reached out to me saying, \u201cI moved to this new company\u2014would you like to hear a bit about it?\u201d&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At first, the message caught me off guard.&nbsp;But&nbsp;I was about a year away from completing a semiconductor plant project&nbsp;at the time,&nbsp;so&nbsp;I&nbsp;was&nbsp;reflecting on my career&nbsp;anyway.&nbsp;Having&nbsp;already worked on several&nbsp;large\u2011scale&nbsp;construction projects, I started to feel that challenging myself in a different industry could be a good next step to broaden my experience as an engineer.&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When&nbsp;I spoke with Yoshinao, I learned that KF was actively developing essential technologies to realize fusion energy&nbsp;&#8212;&nbsp;a&nbsp;next\u2011generation&nbsp;power source.&nbsp;The idea of building fusion energy plants resonated strongly with me, as it would allow me to apply both my construction experience and my background in chemical engineering.&nbsp;This ability to combine my skillsets&nbsp;ultimately led&nbsp;me to join&nbsp;KF.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To be honest, I did feel a little anxious about moving to a startup given the change in&nbsp;working&nbsp;environment. However, that concern was outweighed&nbsp;by the fact&nbsp;that private companies were taking the lead in advancing&nbsp;fusion&nbsp;energy and&nbsp;investing significant resources in its development.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In the end,&nbsp;hearing&nbsp;KF\u2019s&nbsp;mid\u2011to-long\u2011term&nbsp;strategy directly from the executive team during my interviews&nbsp;made me feel confident that KF was a place where I could continue taking on&nbsp;long\u2011term&nbsp;challenges in my&nbsp;career.&nbsp;This&nbsp;was truly&nbsp;the&nbsp;decisive factor.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong><strong>Have there been any discoveries since joining KF?<\/strong><\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">What&nbsp;has stood out to me the most is that even though fusion energy is a completely new field for me,&nbsp;I\u2019ve&nbsp;been able to fully&nbsp;leverage&nbsp;the experience&nbsp;I\u2019ve&nbsp;built so far.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At my&nbsp;previous&nbsp;job, I worked on overall design and construction management for buildings and&nbsp;plants,&nbsp;developing&nbsp;the ability to think holistically about how to arrange equipment and workflows within a limited space. That perspective has proven invaluable when designing fusion plants such as UNITY\u20112, as well as when planning R&amp;D areas at KF headquarters.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">I was also struck by how many talented people work here. While there are still many technical challenges to overcome before achieving fusion energy, KF unites and galvanizes experts across disciplines \u2014 from mechanical design to thermal\u2011fluid analysis. By&nbsp;leveraging&nbsp;each other\u2019s strengths,&nbsp;we\u2019re&nbsp;steadily making progress towards our shared goal of commercial fusion energy.&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"1080\" src=\"https:\/\/kyotofusioneering.com\/kfwp\/wp-content\/uploads\/2026\/05\/Yokoi-san_experiment.png\" alt=\"\" class=\"wp-image-3927\" srcset=\"https:\/\/kyotofusioneering.com\/kfwp\/wp-content\/uploads\/2026\/05\/Yokoi-san_experiment.png 1920w, https:\/\/kyotofusioneering.com\/kfwp\/wp-content\/uploads\/2026\/05\/Yokoi-san_experiment-300x169.png 300w, https:\/\/kyotofusioneering.com\/kfwp\/wp-content\/uploads\/2026\/05\/Yokoi-san_experiment-1024x576.png 1024w, https:\/\/kyotofusioneering.com\/kfwp\/wp-content\/uploads\/2026\/05\/Yokoi-san_experiment-768x432.png 768w, https:\/\/kyotofusioneering.com\/kfwp\/wp-content\/uploads\/2026\/05\/Yokoi-san_experiment-1536x864.png 1536w\" sizes=\"auto, (max-width: 1920px) 100vw, 1920px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong><strong>Is there anything you consciously keep in mind in your daily work at KF?<\/strong><\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">I am always mindful of&nbsp;maintaining&nbsp;close communication with research institutes and partner companies&nbsp;since&nbsp;I believe&nbsp;fusion energy&nbsp;can\u2019t&nbsp;be realized through a single technology or the efforts of a single company alone.&nbsp;Progress comes from&nbsp;bringing together&nbsp;expertise&nbsp;from many different fields.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">That\u2019s&nbsp;why I actively attend domestic trade shows to research potential partners. Fusion energy has strong connections to a wide range of industries&nbsp;including semiconductors and hydrogen production,&nbsp;but&nbsp;products optimized for fusion applications remain scarce.&nbsp;So,&nbsp;I make it a point to speak directly with manufacturers at exhibitions,&nbsp;explaining&nbsp;our requirements and&nbsp;asking&nbsp;things like, \u201cWould it be possible to create something like this?\u201d.&nbsp;Through these open discussions, we exchange ideas and build new partnerships.&nbsp;In fact,&nbsp;we\u2019re&nbsp;currently&nbsp;exploring the joint development of fuel gas measurement instruments and control systems with a manufacturer we met at a recent semiconductor exhibition.&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Also, every time I speak with domestic manufacturers,&nbsp;I am reminded of Japanese craftmanship. Just imagining how this technical excellence could be applied to fusion energy\u2011related&nbsp;equipment&nbsp;fills me with excitement.&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"2560\" height=\"1707\" src=\"https:\/\/kyotofusioneering.com\/kfwp\/wp-content\/uploads\/2026\/05\/Engineer_01-scaled.jpeg\" alt=\"\" class=\"wp-image-3928\" srcset=\"https:\/\/kyotofusioneering.com\/kfwp\/wp-content\/uploads\/2026\/05\/Engineer_01-scaled.jpeg 2560w, https:\/\/kyotofusioneering.com\/kfwp\/wp-content\/uploads\/2026\/05\/Engineer_01-300x200.jpeg 300w, https:\/\/kyotofusioneering.com\/kfwp\/wp-content\/uploads\/2026\/05\/Engineer_01-1024x683.jpeg 1024w, https:\/\/kyotofusioneering.com\/kfwp\/wp-content\/uploads\/2026\/05\/Engineer_01-768x512.jpeg 768w, https:\/\/kyotofusioneering.com\/kfwp\/wp-content\/uploads\/2026\/05\/Engineer_01-1536x1024.jpeg 1536w, https:\/\/kyotofusioneering.com\/kfwp\/wp-content\/uploads\/2026\/05\/Engineer_01-2048x1365.jpeg 2048w\" sizes=\"auto, (max-width: 2560px) 100vw, 2560px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong><strong>Finally, what would you like to achieve at KF?<\/strong><\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">I would like to develop standardized fusion fuel cycle equipment that can be applied to any type of fusion device. To&nbsp;accomplish&nbsp;that, we would need to conduct experiments with UNITY\u20112 to develop measurement instruments, valves, and materials that can&nbsp;operate&nbsp;under extreme conditions&nbsp;like&nbsp;high temperatures, cryogenic environments, and tritium exposure.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">As of now,&nbsp;KF is the only company working on integrated fusion plant engineering&nbsp;&#8212;&nbsp;I believe it is KF\u2019s mission to be the first to complete a fusion plant.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">With that sense of responsibility, I hope to keep challenging myself,&nbsp;building&nbsp;on&nbsp;new&nbsp;experiences, and&nbsp;ultimately contributing&nbsp;to making fusion energy a reality.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u25a0<a href=\"https:\/\/kyotofusioneering.com\/en\/joinus\" target=\"_blank\" rel=\"noreferrer noopener\">Job Opportunities&nbsp;<\/a><br>\u25a0<a href=\"https:\/\/kyotofusioneering.com\/en\/news_category\/interviewsandcolumns\" target=\"_blank\" rel=\"noreferrer noopener\">Previous Behind the Fusion Scene<\/a><a id=\"_msocom_1\"><\/a><\/p>\n","protected":false},"featured_media":3921,"template":"","news_category":[3],"news_year":[25],"class_list":["post-3930","news","type-news","status-publish","has-post-thumbnail","hentry","news_category-interviewsandcolumns","news_year-25","en-US"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Behind the Fusion Scene: Tomoya Yokoi | NEWS | KYOTO FUSIONEERING<\/title>\n<meta name=\"description\" content=\"In a nutshell:Tomoyo joined Kyoto\u00a0Fusioneering\u00a0(KF) as a fuel cycle engineer in October 2023, bringing\u00a0expertise\u00a0in both chemical engineering and\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link 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