As of today's (16-04-2014) manga chapter (chapter 577) we got to know how Zaraki Kenpachi's Zanpakuto looks and what its name is. Kenpachi Zaraki (更木 剣八) is the current captain of the 11th Division in the Gotei 13. He is the eleventh Kenpachi to hold the position. She believes it comes 1st before work or in Kenpachi's words "Fun comes before work". Yachiru shares her Old Captain, Kenpachi's Belief in fighting to the death. The idea of time plays a vital role in this zanpakuto.

Kenpachi Zaraki is an anti-hero from Bleach. The theory: Yachiru is Nozarashi, Kenpachi's Zanpakuto. And it wouldn't feel right against Byakuya unless Byakky also had some kind of asspull power-up to match. there is already a perfectly good explanation. The name of his Zanpakuto is Nozarashi. … He has appeared in the Akuma VS Kenpachi trilogy, which chronicles his long-standing battle with the deadly Street Fighter anti-hero Akuma. His former first lieutenant, and best friend was Yachiru Kusajishi. While his current new lieutenant is now Ikkaku Madarame.

It is a Zanpakuto that is an extension to its wielder, a reflection of what Yachiru’s heart yearns for. Kenpachi Zaraki is the current captain of the 11th Division in the Gotei 13.

She believes fighting to death is the best way to spend one's days or when your bored and have nothing better do. Come one Kubo, make it happen! I'm always waiting for a dramatic opportunity for Kenpachi's zanpakuto to finally be explained, along with the Yachiru backstory, etc.

But against Yammy would be kind of anti-climactic. I really hope Nozarashi's Bankai is Sanpo Kenju. The main fact that drives this theory is that Yachiru disappeared after Nozarashi was first released. While Yumichika Ayasegawa is now officially his third seat. Yachiru Kusajishi is the lieutenant of the 11th Division in the Gotei 13, under command of Kenpachi Zaraki.Oddly enough, she is also the President of the Shinigami Women's Association.Yachiru is currently one of few lieutenants to have yet reveal the name of her zanpakutō. Also, in order to get into Shikai state the keyword seems to be "swallow". those were just zan spirits that Yachiru is friends with. The trilogy consist of Akuma VS Kenpachi Zaraki, Oni VS Kenpachi, andOni VS Kenpachi Round 3. Minazuki satisfies its owner’s dark desires. Unohana has entirely mastered her weapon through her ability of understanding its complex nature. It will explain why Yachiru used Sanpo Kenju against Guenael Lee.

He is the eleventh Shinigami to hold the position and the name Kenpachi, branding him as the strongest Shinigami in martial combat.