Notes from a Japanese student who moved from Tokyo to Seoul for a semester at Hanyang University. Short version: the two transit systems share more DNA than I expected, the ticketing is actually easier in Seoul for a foreigner, and my monthly transit cost came in clearly below what I paid in Tokyo.
Short answer first
Seoul's public transit is "almost drop-in usable" if you're coming from Tokyo. Line colors, station numbering, signage, transfer logic — the base grammar is the same. On day one I barely got lost.
What feels familiar
Anyone who lived on the Yamanote, Tozai, and Sobu lines daily will recognize Seoul's subway on sight.
- Each line gets a color and number (Line 1, Line 2 …); transfer stations show both markers
- One tap with a transit IC card clears the gate
- Rush-hour compression feels close to the Shinjuku–Shibuya squeeze
- Announcements cycle Korean / English / Japanese / Mandarin
The navigation apps (KakaoMap, Naver Map) are more granular than Google Maps for subway routing — they'll even tell you which train car gets you the shortest transfer. Tokyo Metro-app levels of polite.
What's actually different
A few details still trip up new arrivals. Worth knowing on day one.
Fare structure
Tokyo charges purely by distance traveled. Seoul uses a base fare plus distance surcharge model, slightly simpler. Transfer between bus and subway within the window without exiting the gate and you keep a discount. Basic adult fare typically runs around 1,500 KRW, but this moves — always check the Seoul Metro official guide.
The transit card
T-money is Seoul's Suica/PASMO. Buy one at any convenience store (GS25, CU), or at AREX ticket machines at Incheon. No ID required. Felt lower-friction than buying a new Suica as a new resident in Japan.
Last train
Slightly earlier than Tokyo. Depending on the line, service typically ends between midnight and 0:30. If you linger at late cafes, learn the N-bus (night bus) routes in advance.
What it actually costs
My real monthly numbers, spring 2026, one-way 5-stop commute plus weekend part-time travel.
| Item | Tokyo (undergrad year 2) | Seoul (now) |
|---|---|---|
| Monthly commuter pass | ~9,200 JPY | ~45–50k KRW (~5,000 JPY equivalent) |
| Single subway (base) | ~180 JPY | ~1,500 KRW |
| Night-bus rides per month | ~0 | 1–2 |
| Felt monthly total | ~15,000 JPY | ~8,000–9,000 JPY equivalent |
FX moves this, but for me Seoul came out to roughly half to 60% of Tokyo. Exchange-student peers I've asked land in the same band.
Common first-week snags
- Gate won't open → T-money is low. Reload at any convenience store in thirty seconds.
- Can't match romanized station names to Hangul. Use station numbering (201, 202 …) and screenshot your route.
- Bus color codes (blue = trunk, green = feeder, red = metro express). Lean on the app early; pattern-match later.
- KakaoTaxi (local Uber/Go equivalent) is cheap late at night and is a real option after the last train.
Takeaways
- Seoul ↔ Tokyo transit share a grammar; adjustment is fast.
- My monthly transit cost landed around half of my Tokyo baseline.
- T-money onboarding and multilingual announcements ease the first-week load.
- The earlier last train and N-bus logistics are worth researching before you land.
- Actual won amounts move with FX and fare revisions — confirm numbers with Seoul Metro and your university's international office.