making a large bank transfer (domestic)

I need to make a large bank transfer for the purchase of a property in Japan.  (I will not be taking out a loan due to various factors). I have both UFJ and Shinsei accounts, and could transfer from either one. Since it is well above my daily transfer limit, I will need to contact the bank.  Besides that is there anything I need to watch out for?  Tax things or red flags?  Are there bigger fees involved?  Can I make a bunch of daily limit sized transfers in a row? 

I am on the fence about which bank to use, Shinsei seems easier due to smoother communication and…not being UFJ…but isn’t as conventional in the sense of maybe working with other traditional banks (??) like UFJ.  TIA for any advice or sharing your experience with big transfers.  

by ChillyGut