Through Byakuya’s message to Senku, we learn of the events that started Ishigami Village.
I promised you a science gift, 
and that gift is the friends
هدية العلم التي وعدتك بها هي الأصدقاء
Wie versprochen, sind mein
Geschenk der Wissenschaft an dich
Comme promis,
Come ti avevo promesso,
O presente da ciência que eu prometi 
para você são os amigos que
Как и обещано, вот мой научный подарок: