People
- Sen Katayama 片山潜 Japanese communist founder who shook Plekhanov's hand and shaped Comintern East Asia strategy
- Sanzo Nosaka 野坂参三 International communist who founded the JCP, ran the Comintern's Pacific networks, and led the party for 24 years
- Kyuichi Tokuda 徳田球一 First JCP chairman who endured 18 years in imperial prisons