Collaborative Tournament 'Umi Monogatari CUP' Unveiled by Sega NET Mahjong MJ and Umi Monogatari Series Sega has announced the exciting collaboration between their MJ series and Umi Monogatari series, introducing the 'Umi Monogatari CUP' national tournament starting October 6, 2025.

Collaborative Tournament 'Umi Monogatari CUP' Unveiled by Sega NET Mahjong MJ and Umi Monogatari Series #Japan #MJ_Series #Sega_NET_Mahjong #Umi_Monogatari

Sega NET Mahjong 'MJ' and 'Iza! Bancho' Join Forces in National Tournament Sega is hosting a thrilling collaboration event between 'MJ' and 'Iza! Bancho' starting September 15, 2025. Join the action now!

Sega NET Mahjong 'MJ' and 'Iza! Bancho' Join Forces in National Tournament #Japan #Tokyo #SEGA #MJ_Series #Iza!_Bancho

Sega's Collaboration Event Unveils Nationwide Tournament for MJ and CR Nisekoi Sega is rolling out an exciting collaboration event between its MJ series and CR Nisekoi, launching a nationwide tournament starting April 21, 2025.

Sega's Collaboration Event Unveils Nationwide Tournament for MJ and CR Nisekoi #Japan #Tokyo #SEGA #CR_Nisekoi #MJ_Series