Mantra's Sekino appeared on the BS-TBS program "Sekiguchi Hiroshi no Kono Saki Do Naru" (Hiroshi Sekiguchi: What Lies Ahead?).

Mantra's Sekino appeared on the BS-TBS program "Sekiguchi Hiroshi no Kono Saki Do Naru" (Hiroshi Sekiguchi: What Lies Ahead?).

For more details:
https://bs.tbs.co.jp/konosaki/archives/038/