If you most likely mean Naruto anime's "Hashirama Senju" 's surname it's written 千手 according to Narutopedia and it means "thousand-handed" , "thousand hands".
Just an assumption as a Naruto fan but it could refer to the Senju clan's use of mokuton (wood element) with which wooden tentacles springs out of their hands like when captain Yamato uses it.
Other than that you might mean 'Senjuu' with longer 'u' sound which means 'former resident/inhabitant' generally.
"San gatsu" is a Japanese word and in English it means "March"
"juu san" is a Japanese word and in English it means "thirteen"
San
Hitoshi-san
'(o)kyaku(san).'
"Granny", which is the same as "old person" in Japanese is pronounced Ba-San. (baa-san) !
Mr/Mrs/Miss/Ms.
Saint.
Elder or old person is pronounced Ba-San.
mei If addressing some one or talking about someone else's family, add -san at the end (mei-san).
Minna. To politely address everyone, it becomes "Mina-san."
When you are talking about someone else's aunt it is Oba-san. But if you are talking about your own aunt it is Oba.