can someone know yaoi manga with the uke wear traditional clothes, if you know what I mean...

Eh, I could find only these (╥﹏╥ )

http://www.mangago.zone/read-manga/omairi_desu_yo/
tho it's priest clothing

http://www.mangago.zone/read-manga/koko_ni_aru_kimi_no_oto/
and this one is shounen ai

Look if it helps http://www.mangago.zone/home/mangalist/30605/

this list is about school life stories not about traditional clothes

~~ try this :)

http://www.mangago.zone/read-manga/ikoku_irokoi_romantan/

There're 2 traditional men clothes: Yukata & Hakama. Both are sexy to me. Heh~ (▰˘◡˘▰)
I pick some nice Yukata from my tag for you.
http://www.mangago.zone/read-manga/the_secret_agreement/
http://www.mangago.zone/read-manga/hakuyou_ayakashi_gatari/
http://www.mangago.zone/read-manga/dye_of_love/
http://www.mangago.zone/read-manga/otoko_benten_enbun_roku/
http://www.mangago.zone/read-manga/tatsu_no_otoshigo/
http://www.mangago.zone/read-manga/ikoku_irokoi_romantan/
http://www.mangago.zone/read-manga/kimi_ga_koi_ni_oboreru/
http://www.mangago.zone/read-manga/kimi_ga_koi_ni_midareru/
http://www.mangago.zone/read-manga/ake_nure_goyou_ni_furu_yuki_wa/
http://www.mangago.zone/read-manga/sumanai_masumi_kun/
http://www.mangago.zone/read-manga/neko_no_koi/
http://www.mangago.zone/read-manga/iro_wo_mo_kaori_wo_mo/
http://www.mangago.zone/read-manga/fuson_na_hana_o_aisureba/
http://www.mangago.zone/read-manga/itoshii_to_iu_koto/ - Ch.6