Stay cool, love conqueror all odds, I also got jp friends, Jp
are very emotional peoples and they respect true love. They serve
their husband and bf well by treasuring and cherishing the love
given to them. However, they have an open mindset to associate
(unlike Singaporean, so kiasu, jealous and protective).
Therefore you must show your love and be faithful to her, never to
suspect her intention even when she talk to another guy. If you
restrict their movement/control them. They will go away. Respect is
an important culture in Jp society, respect those who respect you,
be it love, friendship or colleague, once your show sincerity and
respect to thme, they will to return that respect more than you
do.