Some helpful sites and information for your reference on Japanese restaurants in Hong Kong:
www.frommers.com/destinations/hongkong/78_inddin.html
Helpful reviews on recommended restaurants and dining places in Hong Kong.
www.eatdrinkhongkong.com/style/japanese.html
A comprehensive directory and map locator of Japanese restaurants in Hong Kong.
www.virtualtourist.com/travel/Asia/Hong_Kong
Hong Kong Travel guide, with consumer reviews and ratings on Japanese restaurants, complete with a directory for quick reference on location.
www.asiabynight.com/hk/restaurants
A restaurant/entertainment guide that contains a listing of all restaurants in Hong Kong, with a description of cuisine as well as other details about the dining places.
japanesefood.about.com
Anything and everything you need to know about Japanese cuisine, complete with chats, forum and recipe guides.
Traditional Sushi Restaurants in Japan
An excellent article with a video about traditional sushi restaurants in Japan.
en.wikipedia.org//wiki/Japanese_cuisine
A comprehensive posting on Japanese cuisine, from its roots to eating habits and etiquette. Also contains a glossary of Japanese food terms.
www.sushilinks.com
A complete online reference guide on everything you need to know about sushi and sashimi. Includes discussion boards, recipes and links to other websites about sushi.
www.sushi.infogate.de/
The Sushi World Guide: A guide to Japanese restaurants outside Japan with user reviews and recommendations.
www.sushifaq.com
The Sushi FAQ –from basic facts and details about sushi, blog sites, recipes and forums.
www.restaurants.com
Provides a search guide for restaurants by geographical location, cuisine; with recipe guides and a forum board.
www.eat-japan.com
All about Japanese food and culture.
www.japanesefood101.com
Glossary of Japanese food terms.
www.webtop4.org/food/2/japanese_food/htm
Links to various websites about Japanese food.

Nigiri
Rice is formed into a ball or a chunk and topped with fresh seafood.
Norimaki
Rice, fresh seafood and vegetables all rolled up in sheets of dried seaweed called nori with the use of a bamboo mat.
Temaki
Basically the same as norimaki, but instead of being rolled in a cylindrical shape, the rice and all the other ingredients are rolled into a cone shape.
Chirashi
The rice is not pressed into any shape or form here, but just laid out in a bowl and all the seafood, vegetables and other ingredients are spread out on top of it.
Inari
Sushi rice is made as a filling for small deep fried tofu bags or aburaage.