Help me identify my teapot :)

Hey guys,

I got this teapot at an auction house because I think it is adorable...I was hoping to find out more but was having trouble...

The auction house described it as "Antique Japanese teapot circa 1800's"

The painted signature looks as though it is a 'B' so thought that this may be more along the lines of an English style 'Japonisme' piece.

Any help would be appreciated!