Just got back to NY from a trip to London and Amsterdam and the best meal I had the whole week (or maybe whole year) was at Japanese Pancake House in Amsterdam. http://www.japanesepancakeworld.com/
I have searched out Okonomiyaki in LA and New York (never had it in Japan yet) and this was the best by far.
It is a small shop with an open teppan grill, and the owners/chefs were extremely nice. Its really great to have a meal cooked by someone who loves the dish. He was talking up a storm while we watched him cook, and he was telling us that pretty much everything except for the sauce and mayonaise is made from scratch.
Three of us shared 3 pancakes; a shogayaki special Osaka, a hiroshima style butatama and a negi-seafood. I liked the butatama best - but all were great.
If you like Japanese food, Okonomiyakai or just want a great meal from a passionate cook - I highly recommend this place.