No. When a yen-per-dollar price is quoted, taking the offer means buying the dollar / selling the yen. If the market is 10929 @ 10930 and you pay 30, you've sold yen. (I'm assuming you're familiar with the spot forex market...)
the title of the thread says you trade jpy, so if you buy jpy, you have sold usdjpy so it is obvious, but not the obvious you think