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Game Content

Developing original content for various platforms

We develop and distribute original gaming content including puzzle games such as the Shanghai Series, text horror adventures, and boys love (BL) games for women, based on know-how accumulated over many years. We also develop immersive games with ultimate playability thanks to the integration of intuitive operations and VR characteristics.

Products & Services

Puzzle Game Mahjong Shanghai Project

Mahjong Shanghai is a thinking game where players take and play pairs of Mahjong tiles from the pile until all the tiles on a screen are gone. This game has long been enjoyed as an original Mahjong tile puzzle.

Sunsoft's Strengths

History of Game Development

As a Game Publisher

Many Dedicated Fans


Mahjong Shanghai

Prize Logic

Ikki Riot

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