Uonuma city is very convenient place to visit. Uonuma city has Kanetsu highway, Jyoetsu Shinkansen super express train, Jyoetsu line and Route 17.
If you'd like to use airplane, Niigata international airport is available. You are able to choose any transportation measure to go to Oze.

Approximate time required are shown below.

Approximate time required by car

Tokyo  --> Koide IC (Kanetsu Highway) ・・・ Approx. 3 hours
Niigata --> Koide IC (Kanetsu Highway) ・・・ Approx. 60 minutes

Approximate time required by train

Tokyo  --> Urasa (Jyouetsu Shinkansen super express) ・・・ Approx. 90 minutes
Niigata --> Urasa (Jyouetsu Shinkansen super express) ・・・ Approx. 40 minutes

Approximate time required by air

Sapporo --> Niigata  ・・・ Approx. 70 minutes
Nagoya  --> Niigata  ・・・ Approx. 50 minutes
Itami     --> Niigata ・・・  Approx. 65 minutes
Hiroshima-nishi --> Niigata ・・ Approx. 75 minutes
Fukuoka  --> Niigata ・・・ Approx. 90 minutes