Indonesia vs Japan

Indonesia has no monthly cost data yet; Japan's $1,631/mo monthly cost (across 4 scored cities) — not enough data to call a winner.

Indonesia's 1.2/5 safety score (across 1 scored city); Japan's 4.8/5 safety score (across 4 scored cities) — not enough data to call a winner.

Indonesia's 1.8/5 mobility score (across 1 scored city); Japan's 4.0/5 mobility score (across 4 scored cities) — not enough data to call a winner.

Indonesia's 3.5/5 culture score (across 1 scored city); Japan's 3.3/5 culture score (across 4 scored cities) — not enough data to call a winner.

Indonesia's passport reaches 38 destinations visa-free to Japan's 122 — Japan opens more doors without a visa. Passport strength shifts over years of naturalisation, not months of planning, so it's a long-horizon footnote — not scored in the tally.

Japan is better connected: 289M passengers/yr against Indonesia's 49M passengers/yr. Indonesia is busier than 56 of 87 countries worldwide; Japan is busier than 82 of 87 countries worldwide. Indonesia sees ~18 air passengers per 100 residents a year; Japan sees ~2 air passengers per resident a year — a derived figure, not itself ranked.

Indonesia runs 24°C to 36°C for most people; Japan runs -10°C to 37°C for most people. Hachinohe runs colder, at -25°C. Depends on you — which range fits your tolerance is the real question here, not a score.