| Best time | March, April, May, October… | March, April, May, September… |
| Climate | mild | mild |
| Budget | Mid-range – Premium | Budget – Mid-range |
| Trip length | 2–5 wks | 1–4 wks |
| Visa | Visa-free for most Western passports (90 days). Verify before travel. | K-ETA required for visa-free entry for most Western passports. Verify before travel. |
| Currency | JPY (Yen). Roughly 150 JPY ≈ 1 USD. | KRW (Won). Roughly 1,350 KRW ≈ 1 USD. |
| Language | Japanese. English is improving but limited outside tourist areas. | Korean. English signage in Seoul; less elsewhere. |
| Tap water | Tap water safe and excellent. | Tap water technically safe but most locals filter or buy bottled. |
| Safety | Among the safest countries in the world. | Extremely safe. |