101 Kyougi Renmei
 | |
| Country | Japan |
|---|---|
| Inception | 1982 |
| Members | 21 |
101 Kyougi Renmei 「101競技連盟」, or simply 101 (ichi maru ichi)) is a professional organization of competitive mahjong players. The organization has been in existence since 1982. It currently operates a two-tier league, whereas historically it has previously operated up to a four-tier league. The maximum number of active members ever was 46 in 1995. The current count above has 21 members.
While they can be called a professional organization, due to both their size and ruleset, they cannot be counted among the Big Five or Big Six as a sixth member.