At minimum, I would ask for a named contact, a written fee schedule, a shortlist of suitable lenders with reasons, and a transaction tracker showing what has been requested, submitted and accepted. The broker should distinguish tasks they perform from matters controlled by the lender, lawyer...
I would not decide whether the buffer is adequate from the purchase price alone. List several months of essential household spending, including the new mortgage and condo charges, and compare that with ¥1,377,000. The inspection and the condo’s building information should then determine how much...