Best would be to say 'Anata/kimi ga koishii' (literally: you are so missed)
(Anata would be slightly politer than kimi which is casual for 'you'.)
There are several other ways to express it when you miss someone in Japanese.
You can simply say 'anata ni aitai' (literally: want to see you), or 'anata wo natsukashindeiru' (I miss you), or 'anata ga inakute sabishii' (with you gone I'm lonely).
Nic and Rocco
Anata o ketsujō shimasu
Watashi wa anata ga inakute sabishii
ビアさん (Bia-san)
2nd one
"I miss Japan" would be written as 私は日本が恋しい。in Japanese. If you wanted to say it out loud it would be pronounced, "Watashi WA Nippon ga koishii."
there is no differnece !
miss kita - is how you say i miss you in tagalog
Watashi wa anata ga inakute sabishii.
Miss you
aitakatta
To say "I miss him" in Swahili, you would say "Ninam-miss."