looking for lionheads

Hello to all,
I am brand new to this site and Im hoping for some help.I am a amercian living in japan .I have just got into goldies especially red cap and other orandas but id like to start another tank with lionheads.Im a little confused abut the difference between ranchus and the lionhead.Im having trouble comunacating with shop keepers becuse my japanese is not good.I would love to buy some lionheads online perhapas or be directed to the proper place around kokoura japan.
thanks