Crab tomalley is called "kani miso" in Japanese. You can easily find kani miso sushi in sushi restaurant in Japan; canned food or frozen in jar is not hard to be found in convenient store or fish market. Price range from US$10-90 depends on quality. Beside Uni sushi (sea urchin), this is my second favorite!
I found a self-served paying machine at the check out counter in Stop & Shop supermarket u.s. 4 years ago. No staff monitored in this section, so 100% of honesty is required, don't cheat and steal.
Hey folks, welcome to eat blog!! A brief intro of myself obviously love food. I've been traveling a lot in my life, and just moved back to Hong Kong about two months ago. Not sure what to write here, but a picture of my new dish to entertain you while waiting for next input. cheers