Company

For projects in Karatsu and Saga, choose a partner close to home. Proven technology and experience, from right here.

Company profile

Company
株式会社ワンソフト Onesoft Co., Ltd.
Address
1525-5 Haru, Karatsu, Saga 847-0031, Japan
Founded
August 8, 2026
Capital
JPY 3,000,000
Representative
Izumi So, Representative Director
Corporate number
5300001014708
Qualified invoice issuer number
T5300001014708
Business
Contract development of business systems and web services AI adoption, data migration and automation Tourism & regional DX (maps, location services, digital stamp rallies) System maintenance and operations
Contact
Contact person: Watanabe
TEL: 080-4904-6985
Mail: hirofumiw880@gmail.com
onesoft

Local, all the way to operations.

We are moving from an era of fitting work to packaged software to one of building software that fits the work. With AI-driven development, we bring the kind of custom systems once only large companies could afford within reach of businesses and governments in Karatsu and Saga.

Our team has developed and operated more than 30 services, and taken part in deployments and pilots with over 10 local governments and public bodies. Working closely with Saga University and others, the same person supports you from first contact through operations.

For projects in Karatsu and Saga, choose a partner close to home.

Unless the scale truly requires a large vendor, a local company is faster, more affordable, and stays with you longer.

Large or distant vendors (e.g. Tokyo)
A local company in Karatsu (Onesoft)
Meetings
Distant vendor: Visits only at milestones; day-to-day via email and video, so on-site realities get lost
Same-day, in-person meetings. We see the site and talk to users before designing
Contact
Distant vendor: Sales, PM and engineers are separate and may change mid-project; requests get passed along
The same person can handle everything from first contact to operations — someone who knows the history fixes things
Cost
Distant vendor: City rates plus travel and overhead; small projects are hard to take on
Local rates, no travel costs. Small projects and step-by-step development welcome
Context
Distant vendor: Local customs, events and seasons must be explained from scratch
We already know Karatsu and Saga
After launch
Distant vendor: Even small fixes take weeks of quotes and approvals; a shared help desk
One phone call and we come over to check and fix it on the spot

Spending stays in the local economy and helps develop local engineers. Feel free to reach out just to talk.

Access

1525-5 Haru, Karatsu, Saga 847-0031, Japan

Start by telling us
what is holding you back.

No specifications or requirement documents needed. We listen to how your work runs today, then propose a rough estimate and a plan. We visit in person anywhere in Karatsu and Saga.

Free consultation