Happinet Media Marketing has announced the launch of new 'Ochaken' (Tea Dog) merchandise at the '9th Showa & Heisei Retro World Exhibition' taking place at Tobu Department Store Ikebukuro from May 14 to 19, 2026. The new items feature newly drawn illustrations of seven characters including Ryoku, Hana, and Chai, all enjoying a clover motif. Fans can look forward to practical everyday items such as denim pouches and frost bottles, as well as fan-activity goods like custom design mirrors and trading card cases.