Be sure to joini the New Otani club:
http://www.newotani.co.jp/en/group/noc/benefits1.html

Membership is free and it gets you a free breakfast (and free use of the gym and the pool in the summer months, I think).

Also - When you check in, you should ask if your stay will earn you some airline miles. Last time I stayed at their sister hotel in Osaka, they told me that my rate would not qualify for JAL miles, but they could give me a few UA miles.

Better than a slap in the face with a wet fish - eh?