Going from Japanese to Mongolian (ะะพะฝะณะพะป) has a composite linguistic distance of 79% (heuristic estimate). Below is the dimension-by-dimension breakdown.
Shared vocabulary, cognates, and loanwords.
Morphology, syntax, word order, cases.
Shared sounds and phoneme inventory.
Japanese โ Cyrillic
Japonic โ Mongolic
The 5 languages with the lowest linguistic distance from Japanese:
A quick 3-question check between Japanese and Mongolian. No signup.