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Tiara 21

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Tiara 21 is a mixed-use commercial complex and its operating company in Kumagaya, Saitama, directly connected to Kumagaya Station.

Last updated September 27, 2026

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Overview

Tiara 21 (ティアラ21) is a mixed-use commercial complex and the name of the company that manages and operates it, located in Kumagaya City, Saitama Prefecture, Japan. It is commonly referred to simply as "Tiara." The facility was developed as part of the redevelopment of the area between the Kumagaya Station building's Azu main building and the commercial facility Nitto Mall, in conjunction with the 2004 Saitama Kokutai (National Sports Festival autumn tournament) and the Saitama Magokoro Tournament. Although construction was delayed and both events had already closed, Tiara 21 opened on November 20, 2004. A company, Tiara 21 Co., Ltd., was established to operate it, with Mitsuhiro Matsumoto — chairman of the local company Matsumoto Beikoku Seibaku Co., Ltd. and then honorary chairman of the Kumagaya Chamber of Commerce and Industry — welcomed as its first president. Like Azu and Nitto Mall, Tiara 21 houses numerous store tenants, and also contains city-related facilities (the Kumagaya City Gender Equality Promotion Center and the Kumagaya City Passport Center), a nursery school (Nishisato Daini Hoikuen), a sports club (Asurie Kumagaya), and a cinema complex (Cine Tiara 21), as well as an attached 14-story residential building, making it a mixed-use complex. It is directly connected to Kumagaya Station and the Azu main building on the third floor. The Tiara entrance, the largest entrance of Tiara 21, also serves as the east exit of Kumagaya Station, with a JR East-format sign displayed on the outside, and an approach via a wider passage and stairs than other in-store corridors leading to the station concourse. It is also connected to Nitto Mall on the second floor by an outdoor connecting passage, and the three buildings — Azu main building, Tiara 21, and Nitto Mall — function together as a major shopping center directly connected to Kumagaya Station, sometimes holding joint campaigns.

History

Tiara 21 was created through the redevelopment of roughly 10,570 m² of land between the Kumagaya Station building's Azu main building and the commercial facility Nitto Mall. The redevelopment was timed to coincide with the 2004 Saitama Kokutai (National Sports Festival autumn tournament) and the Saitama Magokoro Tournament, with Kumagaya City and others acquiring the land. However, construction was delayed, and the complex ultimately opened on November 20, 2004, after both events had already closed. To manage and operate the facility, Tiara 21 Co., Ltd. was established, and Mitsuhiro Matsumoto — chairman of the local company Matsumoto Beikoku Seibaku Co., Ltd. and then honorary chairman of the Kumagaya Chamber of Commerce and Industry — was welcomed as the first president. The complex was built to include numerous store tenants alongside public and community functions, and it was directly connected to Kumagaya Station and the Azu main building on the third floor, with an outdoor connecting passage to Nitto Mall on the second floor. Together, the three buildings function as a major shopping center directly connected to Kumagaya Station, and they sometimes hold joint campaigns.

  • 2004

    Tiara 21 opened on November 20, 2004, after delays, following the 2004 Saitama Kokutai and Saitama Magokoro Tournament.

  • 2004

    Tiara 21 Co., Ltd. was established to manage and operate the complex, with Mitsuhiro Matsumoto as first president.

Products and positioning

A station-connected mixed-use shopping and civic complex serving Kumagaya Station's east side.

  • Cine Tiara 21

  • Asurie Kumagaya

  • Nishisato Daini Hoikuen

  • Kumagaya City Gender Equality Promotion Center

  • Kumagaya City Passport Center

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