“Oasis 21” is an enclosed bus terminal attached to an open-air shopping center.  It is located at the intersection of two major subway lines (and the terminus of a third), and is directly connected to the large underground malls of the Sakae area (e.g. 森の地下街、クリスタル広場).

It is a “3D” station, with four layers.  From top to bottom:

• A publicly accessible glass roof.  This “Spaceship-Aqua” is covered in water, save for the walkable rim.  The view from the top is amazing at night.
• A “field of green”which slopes up from street level on the west side to sky level on the east side.
• A modern bus terminal, serving both city and inter-city buses.
• 30 shops arranged around “Milky Way Plaza”.  The shops include: 3 “cute mascot” stores, 3 boutique clothing stores, a full service konbini,  8 ‘fancy’ restaurants, 3 cafes, a McDonalds, a pastry shop, an ice-cream shop, a travel agency (specializing in honeymoons), and 2 telecom service shops.

Multiple public and private bus lines are served by the Oasis 21 terminal:  (from http://f.hatena.ne.jp/rosenzu/20100321132006)

Departure times are displayed digitally.  Gate 8 shown here: (from http://f.hatena.ne.jp/rosenzu/20100321132304)

The bus terminal is immediately adjacent & directly connected to 3 subway lines:

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The area is well connected by underground malls:

And those underground malls are alive with commerce (note also the maps and wayfinding signs!):

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Kikuko’s “Love Nagoya; Know Nagoya” lists dozens of hotels near the various exits.

Photospheres:

• View of the Spaceship-Aqua at night.
• View of the Spaceship-Aqua in daylight (view from NE corner).
• Inside the theatre at the Aichi Arts Center, directly adjacent to the Oasis 21 Bus Terminal (directly connected at both subway level and sky level).
• View from the top of the Spaceship-Aqua.