138 Tower Park is an extensive national park located in Ichinomiya City, Aichi Prefecture, Japan, in the immediate vicinity of Nagoya. As part of Japan's largest national park system, it attracts visitors with its harmonious blend of modern architecture, exquisite landscape design, and picturesque natural areas created for complete relaxation.

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The centerpiece and main pride of the park is the famous "Twin Arch 138" tower. This impressive structure is not only striking in its elegance but is also recognized as the tallest arch tower in all of Asia, reaching a height of 138 meters. The tower's name is deeply symbolic: the number "138" in Japanese sounds similar to the pronunciation of "Ichinomiya"—the name of the city where the park is located. This gives the tower a special connection to the local identity.
The Kiso Sansen Park territory covers an impressive 26.4 hectares, offering guests a variety of opportunities for leisure and outdoor walks. The park is very popular with families with children, tourists, and locals who appreciate it for its wide range of entertainment and the colorful seasonal events held here throughout the year.