We are plumsa Co., Ltd. based in Tokyo,
Japan, and we have been providing custom software development services for over 25 years.

We’re a dedicated team of professionals with expertise in software design, development, and maintenance, committed to enhancing your business’s success. With a proven track record of successfully completing over 300 projects, we bring extensive experience in software development across diverse industries.
Our software is renowned for its quality, and we’ve been recognized for our technical prowess as a certified development partner by ZOOM, a global leader in online conferencing tools. We’re convinced that our technology can be valuable not just for Japanese businesses but also for international enterprises. Consequently, we provide custom software development services tailored to the needs of global clients.

Our Customers

As evidence of our commitment to high-quality software development, we have earned various certifications and awards

Awards & Recognition

Our Vision

Our goal is to provide genuinely useful technology solutions in the field.
We strive to propose the right solutions to address your business challenges and needs, delivering practical value.


Toru Shimada

CEO, System Consultant

Junki Tatsumi

Executive Officer & Project Manager

Tokyo Office

plumsa Co., Ltd.
Es Scenario Akasaka EAST 002,
4-2-11 Akasaka, Minato City,
Tokyo, Japan