What omiyages to bring back from Hawaii?

We will return to Japan at the end of summer vacation. If we buy chocolate, will it be so hot in Japan that it will melt? I have so many people to give, so I don't want to spend all that and have it melt on me. (By the way, is chocolate macadamia nuts a good gift to bring though? I see them sold in many stores here already, it's as if it's not anything unique anymore!!)

Also, in addition to small souvenirs like the chocolate, I would like to get something a little more special for a number of people that have been extra kind and helpful and am wondering what other ideas for gifts there are that Japanese people might like to receive? Or to avoid (like if they will think it gaudy and not want or use it)? Has anyone been to Hawaii and had to get some nice omiyages for special people back in Japan?

So far we have received (from friends who went to Hawaii from Japan): macadamia nuts chocolate, macadamia nuts in a can, towel, tea towel & pot-holder, etc. with Hawaii design on them, skin care products with special fragrance, Hawaiian coffee (not necessarily the expensive Kona, but flavored coffee too), etc., and liked them all :)

Oh macadamia and other nuts with some fun flavors were good too :) Also some t-shirts too (though you need to know the size...)

http://find-travel.jp/article/16100
https://retrip.jp/articles/4150/
http://spotlight-media.jp/article/140808793294818021
http://mnky.jp/10302
http://matome.naver.jp/odai/2140228279705485101
http://fishand.tips/column/c_hawaii/hawaii-20-souvenir/
https://kaumo.jp/topic/70419

iPhone cases/covers,Music CDs(not DVD/BD) and more.

Honolulu Cookie are Japanese preferred taste.

I don't necessarily know what someone from Japan would want but I live here in Hawaii, Oahu to be exact and can suggest some things that might be helpful in your endeavor.

If you're looking for sweets like the macadamia nut chocolates then I suggest you check outBig Island Candy, they have an assortment of cookies and other types of sweets as well, for instance, chocolate dipped Kona coffee flavored cookies are deliciously and a local favorite.

Also if you're on Oahu there is a little shop located in Pearl City called "Made in Hawaii" which has nice selection of tasty Hawaii themed omiyage.

Finally, it's currently mango season here. Be in the look out for freshly made mango products like mango bread, pickled mango, mango jellies, chutneys and so on.

I hope you have a wonderful time while your here!

Aloha,
Nik