This page summarizes my own and my fellows' knowledge of good sources of Japanese cuisine in Switzerland. Your contributions, notes, and suggestions are warmly welcome.
Some references contain rating of maximum 5 points. This is only my own or my friends' personal opinion, and it must not be considered as an expert's rating.
Warm regards and thanks to those who has shared useful information: Dmitry Klimenkov and his wife Natalia; Fiona and Ramon Robinson.
Special thanks to my wife Olga for introducing me to the Japanese world.
Thanks to MaKo for allowing me to inherit the CSS styling from his website.
Many nicknames are taken as-is from our Internet forum. I do not know many of these people personally.
As noted by Kuzma, the fresh fish in Geneva is never delivered on Mondays, and some Japanese restaurants are closed. In other ones it is a high chance to have the frozen fish. If properly deep-frozen, such fish is not bad, and even safer, but the taste is slightly different.
Source: Irina. 20 meters towards the lake from the Migros supermarket. Sushi is better and cheaper than Uchitomi's. Good choice of ready-to-go sushi, sashimi, various Japanese salads. They can also cook them on telephone pre-order. Also a good choice of fresh ingredients, like daikon etc.
This is a big Globus supermarket near Bahnhofstrasse and the central railway station. On the underground floor, there's a food specialities shop called Delicatessa. They also make sushi of extremely good quality.
This is a big asian cuisine restaurant and take-away. Takeaway sushi can be found on the ground floor, furthest from the entrance. The variety and freshness of susi sets is far behind those offered by the restaurant upstairs.
Source: Lyss. More or less good quality sushi, and interesting atmosphere. They play Manga videos all the time, and "Tourist" by St. Germain (no idea what it is, ask author or see the URL -- S.S.)
There is a good directory of Japanese restaurants world-wide at http://www.sushi.infogate.de/query.php3. Some addresses and phone numbers differ from what I got, and some seem to be outdated. But still, it's very much worth checking.
See also: http://www.sushi.infogate.de/rest/eu_switzerland_geneva.htm
The first one is a very small restaurant, neighbouring to the Uchitomi shop. You may seat in front of the cook and watch your sushi being cooked. The space is strictly limited, and the reservations should be made beforehand. The cook and the waiters are native Japanese, as well as many guests.
The second one is much larger, and easier to get in. It's a bit noisy, yet the food is excellent. Also it has the excellent view from the terrasse to the lake and Mont Blanc (as noted by Irina).
Source: Lyss. This restaurant has not made any good impression. It's placed near Miyako restaurant, and is not as good as that one.
Source: Lyss. Good, and rather expensive restaurant in Hotel Mövenpick near the airport. Few tables in front of the cook, and few regular ones.
Source: Lyss. This restaurant is new, and there's not much information about it. European style tables, fairly good quality.
Source: Lyss. Good and expensive. Two floors, with the cook on the upper floor. Very good sushi and sashimi. Sikuyaki is not bad, though not as good as in Sagano.
Source: Lena. Excellent restaurant, a bit aside from the city center, modest prices. Resided in same building as Centre Coop. The upper floor is decorated in traditional Japanese style.
Source: Natusia. Small and neat place. Some people order the dishes by phone and take them away in a half-hour. Very good Nigirizushi with tuna fish, eel, shrimps Emaebi, and Temaki.
Source: Irina. Small, good and not expensive restaurant. You may try the exotic entree made of raw calamares and yeast.
Source: Irina. No fresh fish at all. The place is yakitori specialized. Only two small tables, all other places are at the bar around the cook. Best to come by two. Three people is a crowd.
Source: Dmitry Klimenkov. Famous and very old restaurant in the center of Geneva. The owner, "Grandma Yamakawa", sometimes meets the guests personally.
One of the few restaurants inside the big casino building. It seems that sushi is not the chef's favorite food. Modest choice of dishes.
See also: http://www.sushi.infogate.de/rest/eu_switzerland_zurich.htm
This is a big asian cuisine restaurant and take-away. Every month's first monday, they make Sushi Buffet: all-you-can-eat for about CHF 70. Drinks are paid separately.
Rich variety of Japanese cuisine, with relatively modest prices. A little bit aside from the town centre, but it's strongly worth going.
They offer the same fish that is used for their sushi take-away.
A very famous place for various fish and sea foods. They also offer sometimes sushi sets of fairly decent quality.
This fast-growing network of fish shops is a real must-go for any fish or seafood gourmet. The shops in Dietikon and Dietlikon are rather big and rich. The one in Schlieren is a small outlet in the industrial zone, with limited choice of fresh and frozen seafood.
Same place again 8-). In this small shop, you can find anything a Japanese would need abroad. For those from other countries, a huge variety of Japanese specialities is available. Starting from soft drinks (Try 'Calpis', you might like it), ending with video tapes. You can even find a good rice cooking machine there!
This shop is not as rich as Uchitomi, but is also worth seeing.
These are the arbitrary links about Japanese life in Switzerland, sometimes not verified personally nor by someone that I know...