Jantama Launches Akagi Collaboration Tournament With Transparent-Tile Special Rules

Yostar’s Mahjong game Jantama (Janshou) is holding the Akagi collaboration event “Washisu Mahjong Duel Battle.” Two players who advance from an online qualifier will team up with professional mahjong players for an offline final using special rules where many tiles become transparent. Qualifiers begin June 12, 2026.