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.

Does the Naruto manga explain how Hashirama got sage mode? - Quora

Hashirama Senju, Naruto Fanon

Hashirama Senju, VS Battles Wiki

In Naruto, what's the different between the different sage modes like “toad”, “snake”, Hashirama's sage mode, and possibly “slug sage mode”? Do they grant different abilities? - Quora

Was Hashiramas sage Jutsu ever explained? Where did he obtain sage mode? : r/Naruto

What is Sage Mode in Naruto?

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

Hashirama Senju (Canon)/Slappyjoe056, Character Stats and Profiles Wiki

Hashirama Senju, TASW Wiki

Naruto's BIGGEST MYSTERY-What Was Hashirama's Sage Mode #naruto #hashi

Naruto Chapter 621 Breakdown: You've got to “hand” it to Hashirama… he's good.