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Company

stak, Inc.

Deriving the right technology to match the changing times.
Creating ultimate comfort with a bold yet delicate vibe.
That's the kind of company we are.

Representative Director & CEO Shinichiro Ueda
Shinichiro Ueda
Representative Director & CEO / stak, Inc.
CEO Message

"Labor cost = time"
redefined.

stak is not just an IoT company.
We are an AI infrastructure company that starts from the idea that "the scarcest resource is time."

Since we started in 2014 with the development of the IoT product stak, we have been serious about eliminating the irrational hours in the world. stak, which turns a home smart just by swapping a light bulb; addcari, a rental space you can use without meeting anyone; homehub, which makes existing homes ready for unmanned operation —— all of them are built on the same consistent idea: erase as much of the work that steals people's time as possible.

And with the arrival of the AI era, the areas in which we should redefine “time” have expanded dramatically. Our AI & DX training has been put into practice at more than 200 sites so that companies can run on their own at a level where they can genuinely “use” AI. Our digital marketing fuses AI tools with strategy, realizing a world where the work people do not need to do can be left to AI.

Redefining "labor cost = time" with AI.
That is stak's essential mission.

Our Journey

The stak Story

Twelve years of continuous evolution in the IoT × AI × digital space since our founding in 2014.

2014
February
Needol, Inc. founded

Founded in Hiroshima, with the mission of "creating an overwhelmingly rational society".

2019
February
Renamed to stak, Inc.

Shifted fully into the IoT business and changed the company name to "stak". That same month, announced the first model of "stak", the expansion-module IoT device.

2019
March
Won the Monozukuri Hardware Cup

Won an award at the Monozukuri Hardware Cup, the gateway competition for domestic IoT startups. stak's technical capability received public recognition.

2019
October
Capital increased to 30 million yen

Increased capital in step with business growth, laying the foundation for mass production and wider distribution.

2019
December
Winner of the Hiroshima Venture Development Fund award

Received the Hiroshima Venture Development Fund award as a locally founded startup. A foothold for expanding from Hiroshima across Japan.

2022
August
stak's core technology is patented (Patent No. 7136450)

The core technology of our expandable modular IoT device has been granted a patent.

2020-23
Launch of addcari / homehub / AI & DX training

Launched the space-rental service addcari, the smart home service homehub, and — after the arrival of ChatGPT — the AI & DX training business, one after another.

2025
200+ training and development projects / 2,400+ blog articles in total

A track record of more than 200 AI & DX training and system development projects. Ongoing posts by our CEO and staff have reached a cumulative 2,400+ articles.

2026
Toward an AI infrastructure company that redefines "labor cost = time"

Built on 3 products × a track record of 200+ training and development projects × 2,400+ articles published, we are moving to the next phase as an AI infrastructure company.

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