There is a page on the Ministry of Defense website listing curry recipes for various ships/subs/etc. in the JMSDF. http://www.mod.go.jp/msdf/formal/family/recipe/archive/curre...
I do wish they'd change the Japanese naval flag -- in much of East Asia the Rising Sun Flag is seen as a symbol of oppression and Japanese imperialism, almost as potent as a Nazi swastika. It doesn't do Japan any good to fly the old imperial flag from every Maritime Self Defense Force vessel, even if it was the naval flag since 1889 (by which time Japan already had imperial designs).
The british flag, spanish flag, french flag, russian flag and even the american flag are greater symbols of oppression and imperialism in east asia. I don't think we are going to be changing flags anytime soon. The greatest and most oppressive imperialists in asia wasn't the japanese after all. It was mostly europeans with a dash of american imperialism thrown in the mix.
But that's besides the point. Also, how about letting the east asians decide amongst themselves what they find offensive. No sense in us being offended on their behalf.