We are three Muslims in Japan for three months. Can we pray Salah al-Jumu'ah as a group?

All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.

Some scholars are of the opinion that if there are only three Muslims in a place they have to perform the Friday prayer.

Among those scholars who are of the mentioned opinion are Abu Yousuf (the companion of Imam Abu Haneefah) and Imam Ahmad (according to one narration). Imam Ibn Taymiyyah had also preferred this opinion.

Therefore, you are allowed to perform the Friday prayer.

For more benefit on Friday prayer, please refer to Fataawa 82835, 82979, 356992, 117037, and 257203.

Allah knows best.