Murata used his breathing technique (Galaxy Breathing) to Muzan in the final battle arc, that time when Tanjiro got poisoned. It got me off guard cuz, look at the manga Muzan's face is shocked- 'But it's real to ME- ' *takes out his katana, says "Yaseenthatguy Breathing: 2nd form, Explaining the truth of Galaxy Breathing"*
If you guys didn’t notice but when Tomioka was in the final selection we see an extremely young Murata helping him get up when we was really hurt (this is when Sabito says 💀)
He was the only one not to get tied up by the spider mom and actually was one of the people to survive the Natagumo mountain out of all the non-main characters. (But it also could be the side character plot armour☠️)
That's because hes not good at water breathing, the black black are users who can't master a certain breathing style and murata uses water breathing but barely
Crazy Theory, what if Murata is also a potential Sun Breather. Canonically Murata has poor mastery of water breathing and though water breathing is the most common breathing style doesn't mean it's the easiest to learn or naturally comes to most individuals and due to this lack of mastery of water breathing and seemingly the color of his nichirin blade being slightly black he does meet the qualifications of the said omen of the black Blade along with meeting the situational flaws of a sun breathing user who doesn't have any inherited memory or proper teacher. Tanjiro, for example, learned water breathing naturally as despite his Affinity with sun breathing later on due to water breathing potentially being his strongest Affinity had his ancestor not passed down what he had witnessed
A lot of people think Murata's sword is black meaning he can use sun breathing but that IS NOT TRUE (spoilers ahead) because Tanjiro only knew it since he remembered his father doing it. His father doing the dance is actually a passed down dance from the Kamado Family, as their ancestor, Sumiyoshi Kamado, who became good friends with Yoriichi himself after he was saved by him and saw his sun breathing forms after Sumiyoshi kept asking to see them. After yoriichi visited them the last time Sumiyoshi promised to pass down the forms of sun breathing in a dance. This also means that Hinokami Kagura isn't exactly Sun breathing its a copy of it that is a bit different since it got passed down through generations. Also Yoriichi gave the earrings to Sumiyoshi and that's why Tanjiro's family has them. Also, I could be wrong, but I think in the manga they might have said Murata's sword is not in fact black but is actually blue-grey, which makes sense, considering he is confirmed to use water breathing
realistically, if murata had a good breathing style and main character strength, he would probably stay with the kamaboko squad and would probably cook almost as much as tanjiro
Dude I guess Inosuke Is Very Strong and yet he is so Underrated Reason 1) When the final fight with Upper six Daki We know That the Zentisu Was Using Thunder clasp God Like speed while Beheading Daki But he was Not Able to do that on his own that time Inosuke was able to keep up with God like Thunder speed 2)We Tanjiro Required His mark To move a Boulder in giyomei's Training And Inosuke Moved it with no Mark Inosuke is Far superior In terms of Speed And strength than Tanjiro And Any Hashira (almost greater than a average hashira)