Fukuoku
n. a small, fingertip vibrator,possibly created in Japan. There is also a five-fingered glove available for the ultimate in stimulation. The vibrator may be small, but it is relatively powerful. There are also several different sleeves for the device that can be added in order to create new sensations.

'Fukuoku' is not a real Japanese word.
I knew I was going to cum when he broke out the Fukuoku.