Independent studio · One person

Making
stuff on
computers.

高速インタラクティブ

Kosoku Interactive is an independent studio — one person, building games, tools and experiments on computers, and putting them out where other people can play with them.

Kosoku Interactive mascot holding a lightning bolt
KOSOKU / MAKING THINGS / 2026
01 — HELLO
MAKING STUFF✳HAVING A GOOD TIME✳USING COMPUTERS✳ SHARING IT✳GAMES✳TOOLS✳ WHATEVER SEEMS FUN✳

A real studio.
Population: one.

Kosoku Interactive is an independent studio — and it's one person. Both of those are true at the same time, and neither cancels the other out. The name is a real thing work goes out under.

Small is deliberate. It means building whatever seems worth building, shipping it when it's actually ready, and standing behind it — no layers, no handoffs, no roadmap written to impress anybody.

002 — The game

瞬刻 —
A Flash of Time

The first finished release out of the studio. A neon arcade thing about slicing targets to buy back time, chaining atoms, and freezing the clock when things get out of hand.

Playable now — 001
Playable in your browser

瞬刻.A Flash of Time

Slice through targets to buy seconds, dodge the bombs, and pop the atoms to clear the board. Fill the meter and freeze time for double score. Eight zones, infinite levels.

Say hi.

Whether you played the game, found a bug, or just want to talk about making things — this reaches me directly.