Santaku are going to hold a special event in the first quarter of 2020.
Santaku!!! Chapter 4 (さんたく!!! ～Chapter4～) is going to be held at Makuhari International Training Center Symposium Hall in Tokyo on 22/03/2020.
The event will count with noon and evening sessions. Shintaro Asanuma, Shinichiro Kamio, Wataru Komada and Shugo Nakamura are confirmed to guest in the event.
For more details on this event, please refer to the official website (link below).
Source: Santaku official twitter accoutn