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Kumai Co., Ltd.

As of February 13, 2026

“The confidence to work without worry was the deciding factor.”
A Vietnamese Engineer’s Journey: From Mechanical Design to Cutting-Edge VR and DX Development.

From Tiền Giang City (south of Ho Chi Minh City), Vietnam

Mr. Phan Thanh Hậu

Visa Status: Engineer/Specialist in Humanities/International Services

【Profile】

After graduating from Ho Chi Minh City University of Technology and Education, he studied at a Japanese language school for one year. Moved to Japan and joined Kumai Co., Ltd. in May 2024. In 2025, he obtained the JLPT N2 certification.
Job responsibilities: Design and XR Divisions, focusing on 3D modeling for coating equipment and software development for VR and Digital Transformation (DX).
Hobbies: Gaming, watching Yokohama F. Marinos soccer matches, and cooking with friends.
Favorite Japanese food:Sushi

• Working in Japan

  What inspired you to work in Japan, and why did you choose Kanagawa Prefecture?

  While studying mechanical engineering, I wanted a career where I could apply my expertise. I have always been interested in Japanese manufacturing and technology, so working in Japan became a major goal for me.
  Regarding Kanagawa, Yokohama is very famous even in Vietnam, so it felt familiar. Another reason was its proximity to Tokyo and my interest in Yokohama’s soccer teams.

  

• What was most important to you when choosing a job in Japan?

  I focused on whether the job would allow me to use the knowledge from my university studies and whether the work environment seemed like a good fit. Since I majored in mechanical engineering, finding a role that matched my specialty was very exciting.
  Location and work environment was also my priority when choosing a job. I wanted to live near Yokohama city and a workplace where I felt I could work "with peace of mind."

  Why did you choose this industry and company ?

  In the company’s explanation, the job description was very concrete, which made it easy for me to visualize myself working there. Although I had some anxiety about moving to Japan, I felt Kumai was a place where I could work safely.
  I was also attracted to the opportunity to engage in design and 3D modeling using my mechanical engineering background. Knowing that other foreign talent was already active in the company gave me additional confidence. Furthermore, the company encourages new challenges—it is a workplace where my ideas and desire to "try something new" are respected and supported.

  

  An image of a painting plant facility designed and manufactured by Kumai Co., Ltd.
  Note: For confidentiality reasons, parts of the background have been edited using generative AI.

  How did you prepare to work in Japan?

  Before I arrived, the company explained the visa procedures clearly, which allowed me to prepare smoothly. Having an environment where I could ask questions in advance meant I didn’t have to worry alone.
  After graduation, I focused on studying Japanese language for one year and completed my visa application before coming. Even after arriving, I have been able to consult with the company whenever I have questions about daily life, allowing me to start my new life without anxiety.

  About Your Current Job

  What are your current responsibilities?

  I handle the design and 3D modeling of coating plant equipment. At the same time, I am part of the XR Division, where I work on VR and software development.

  

  Mr. Phan conducting an operational test of an in-house developed AR program at the XR Division.

  When do you feel most fulfilled at work?

  I feel the most fulfillment when I take on challenges in new fields and am able to make the most of my abilities.

  How do you manage challenges at work?

  At first, I was a bit confused by the differences in standards and workflows between Japan and Vietnam. However, because the atmosphere makes it very easy to talk to others, I can immediately consult with my colleagues or supervisors. This allows me to work without feeling anxious or stressed.
  When dealing with many technical terms, I use 3D models and drawings in addition to words to communicate clearly. I also make it a point to finish my tasks within scheduled hours and avoid overtime.
  

• Life in Japan and Future Goals

  What surprised you most about life in Japan?

  The punctuality of the Japanese people. I was truly surprised that buses and trains arrive exactly on time.

  What do you find attractive about living in Kanagawa?

  The transportation is very convenient, and all the facilities necessary for daily life are nearby, making it a safe and comfortable environment. The ocean and cityscapes are beautiful. On holidays, I enjoy a fulfilling life, like watching soccer in Yokohama and cooking with my friends.

  What are your future goals in Japan?

  As an engineer, I want to take on even more diverse fields and projects to contribute to the growth of the company.

  Advice to People Who Wish to Work in Japan

  Any advice for those considering working in Japan?

  It is natural to feel anxious before starting work in Japan. I personally had worries about the language, my job, and daily life.
  The important thing is to understand the job details and the working style beforehand and never hesitate to ask questions. In addition to studying the language, learning about Japanese culture and workflows will reduce your anxiety. By not keeping things to yourself and consulting with those around you, you will find it much easier to sustain your work and life in Japan.

【Company Profile】

Company Name

Kumai Co., Ltd.

Address

3-4-19 Yoshioka Higashi, Ayase City, Kanagawa Prefecture

Founded

2022

Business

Manufacture and installation of coating plant equipment; large-scale metal fabrication, sheet metal work; XR/VX business.

Number of Employees

15

Number of International Employees

9Vietnamese

Company URL

https://kuma-i.co.jp/

As of February 13, 2026

株式会社熊井HP