Born in Tokyo. Built for creators.
クリエイターのアイデンティティを形にするために、私たちは存在します。
Kosei 個性 was founded in Tokyo by a team obsessed with creator culture — the way a hoodie drop can sell out in minutes, the way a limited-edition pin can mean the world to a fan. We built the agency we wished existed: bilingual, fast, eco-conscious, and deeply plugged into the YouTuber, VTuber, streamer and influencer world.
We manage everything from A to Z — concept, design, manufacturing, warehousing, direct-to-fan shipping, and online shop management — so you can stay focused on creating.
20+
Countries shipped to
配送先国数
3 days
Average turnaround
平均納期
100%
Eco-certified materials
エコ認証素材使用率
私たちの仕事の仕方
バイリンガルチーム
Our team works fluently in Japanese and English. That means no brief gets lost in translation — whether you're a creator based in Tokyo or streaming to fans worldwide.
サステナビリティを最優先に
We source only eco-certified, sustainable materials. Good merch shouldn't cost the earth — literally. Every product we make meets our environmental standards.
クリエイタースピードで
Drops wait for no one. We're built to move fast — from finalised design to production-ready in days, with worldwide fulfilment handled from our Tokyo warehouse.
