About COSMA
COSMA is a marketplace built for cosplayers. You can safely buy and sell cosplay costumes, wigs, props, photography gear, and related items with anonymous shipping and Stripe payments.
Mission
Our mission is to create a dedicated place where cosplayers can pass costumes on with context, care, and confidence.
General flea-market apps and direct trades on social media are not optimized for cosplay. COSMA focuses on series, character, category, size, condition, payments, and community from the start.
What COSMA Provides
- Cosplay-first search - Search by series, character, category, size, and condition.
- Community links - Listings connect naturally with events, studios, galleries, and future offline community features.
- Stripe Connect buyer protection - Funds are held through Stripe until the buyer confirms receipt and the transaction is completed. This is buyer protection, not an escrow account.
- Low platform fees - The platform fee is 5% of the item price, paid by the seller.
How COSMA Is Different
Cosplay costumes can be hard to find on general marketplaces because search results are crowded with mass-produced items. COSMA is designed around cosplay discovery from the ground up.
| Item | COSMA | General marketplace |
|---|---|---|
| Costume search | Search directly by series and character | Generic keyword results |
| Selling fee | 0% during the campaign | Often around 10% |
| Categories | 8 cosplay-specific categories | Generic categories |
| Community | Events, gallery, and studio information | None |
| Identity verification | Stripe Connect identity checks | Email registration only |
Why Cosplayers Choose COSMA
- Find by character name - Reach the item you want faster through series and character search.
- Safer transactions - Verified sellers and Stripe-powered payments help reduce uncertainty.
- A cosplay-focused community - The marketplace connects costumes with events, studios, and galleries.
Categories
Operator
| Operator | Pepin |
|---|---|
| Service | COSMA |
| Representative | Shimpei Oshima |
| Location | Ebisu Nishi 2-4-8, Shibuya-ku, Tokyo, Japan |
| Launched | April 7, 2026 |
| Languages | Japanese / English / Chinese / Korean |
| Region | Japan domestic shipping and pickup |
| Contact | support@pepin.studio |
| Operator site | https://pepin.studio |