Naruto: How Hashirama Senju achieved Sage mode, explained

​The Naruto universe has witnessed firsthand how powerful Hashirama Senju’s Sage Mode can be, but not much is known about it.

Untangling the mystery of Six Paths Sage Mode : r/Boruto

At first watch I thought that the Sage of Six Paths just “gave” Naruto and Sasuke power-ups. Rewatching made me realize that there were real-world reasons for them awakening those powers: Naruto

Where did Hashirama learn Sage Mode from? - Quora

Sage mode Hokage Naruto vs sage mode Hashirama - Battles - Comic Vine

It's weird to me Hokage Naruto still need time to turn into Sage Mode while Hashirama/Kashin Koji can turn almost immediately. : r/Naruto

Sages and Senjutsu

Hashirama Senju, VS Battles Wiki

Hashirama Senju, Wiki

How did Naruto master sage mode so quickly? - Quora

Naruto: 10 Things Every Fan Should Know About Hashirama Senju

THE FORGOTTEN SAGE MODE-ORIGINS OF HASHIRAMA'S SAGE TRANSFORMATION

It's weird to me Hokage Naruto still need time to turn into Sage Mode while Hashirama/Kashin Koji can turn almost immediately. : r/Naruto

Naruto: 10 Best Techniques Created By The Senju Clan

What type of Sage mode is Hashirama using? - Quora