
Kinugawa is one of Japan's worst examples of development gone overboard: after a serious case of boom and bust, what was once a pristine mountain valley is now a graveyard of rusting, abandoned ferroconcrete hotels. Still, the town remains within fairly convenient striking distance of Tokyo and the Kinugawa River is as stunningly green-colored as ever. If you can spare the cash and time, it may be worth it head up northward to Kawaji, which isn't quite as overbuilt.
The name "Kinugawa" literally means Angry Demon River. The exact provenance is unclear, but the most likely explanation is that this comes from the raging waters within — although the river is now dammed and considerably more placid.
The Japanese particularly like soaking in the many hot springs here.
More information about the Kinugawa area can be found here: [3][4]
There is little to see in Kinugawa Onsen itself, but the Nichien Momiji Line, the highway connecting Kinugawa and Kawaji, makes for a fairly scenic drive.
Three theme parks in the area, collectively known as Kinugawa Theme Park, are major draws for Japanese visitors:
Kinugawa is most easily reached on the Tōbu Kinugawa Line (東武鬼怒川線) from Asakusa in Tokyo.
Tobu runs all-reserved limited express services, known as Tokkyū (特急) trains, to the area. These trains, which use Tobu's "SPACIA" railroad equipment, have comfortable, reclining seats, with vending machines available on most trains.
The Kinu (きぬ) limited express departs from Asakusa every 30-60 minutes, and reaches Kinugawa-Onsen (鬼怒川温泉) in 2 hours at a cost of ¥2800. Ordinary rapid trains are cheaper at ¥1500, but take anywhere from 2 hours 20 minutes to 3 hours to reach Kinugawa. Kawaji is another 20 minutes up the line.
The Kinugawa Theme Park Pass [5] includes a roundtrip fare and access to Kinugawa Theme Park. Valid for 2 days. Cost ¥3300-6000, depending on the attractions chosen. This pass is available only to foreigners.
New limited express train service operated by both JR and Tobu began in March of 2006, offering three daily services in each direction between Kinugawa-Onsen and Shinjuku, Ikebukuro and Omiya.
The trains, called the Kinugawa and Spacia Kinugawa, depart from Shinjuku station at 10:35, 13:05 and 17:35. Return service departs Kinugawa-Onsen at 8:13, 10:36 and 15:03.
In additon, a limited express train departs from Shinjuku at 7:12 for Nikko. You can transfer from this train at Shimo-Imaichi (下今市) for a shuttle train service to Kinugawa. The last service to Shinjuku departs Kinugawa-Onsen at 16:24 (Shuttle train connecting at Shimo-Imaichi to the limited express).
Seat reservations are mandatory, and the one-way fare between Shinjuku and Kinugawa-Onsen is ¥3900. If you plan to use this train in both directions, you should purchase a JR Tobu Nikko Kinugawa Free Pass for ¥6800, which includes one round-trip on the limited express and unlimited usage of local Tobu trains and buses in both the Kinugawa and Nikko areas within a three day period.
The new limited express service is fully covered under the JR East Rail Pass; national Japan Rail Pass holders can use it for ¥1560 each way (covering the portion of the trip between Kurihashi and Kinugawa-Onsen). The Japan Rail Pass does not cover Tobu trains or buses, and the JR East Rail Pass only covers local Tobu trains between Shimo-Imaichi and Tobu Nikko, and Shimo-Imaichi and Kinugawa-Onsen. You will have to pay separate fares for any services that are not covered.
You can alternatively take the Shinkansen from Tokyo Station to Imaichi, and then change again to the Tobu line for the final leg, but this is unlikely to be worth the hassle even if you have the Japan Rail Pass.