Echiso Building

Echisou Building: A Taisho-Era Landmark on Hongo-dori

Standing proudly on a corner lot along Hongo-dori in Tokyo's Bunkyo Ward, the Echisou Building (エチソウビル) is a striking reminder of early 20th-century commercial architecture in Japan. Completed in 1924 during the Taisho era, this three-story reinforced concrete structure was built as the headquarters of Koshiso Shoten, a thread and yarn wholesaler. The building's name derives from the founder's name, Echizenya Soubei (越前屋惣兵衛), whose textile business once thrived in this academic and commercial neighborhood near the University of Tokyo.

Registered as a National Registered Tangible Cultural Property in February 2023, the Echisou Building continues to serve as a working commercial property, now housing various tenants. Its elegant facade, with white mortar walls, gentle rounded corners, and classical decorative elements, makes it a beloved visual landmark that anchors the streetscape of Hongo.

Historical Background

The Echisou Building was constructed in 1924 (Taisho 13) for the Koshiso Shoten Limited Partnership (合資会社越惣商店), a merchant dealing in threads, yarns, and other textile goods. The Hongo district, known for its proximity to the University of Tokyo, was a bustling commercial area during the Taisho and early Showa periods, with many small businesses catering to the local community of students, scholars, and residents.

The original building was later expanded in the early Showa period, when the eastern and southern portions were added in reinforced concrete to incorporate the existing western structure. This expansion gave the building its current L-shaped footprint and its distinctive raised southeast corner, which functions as a small tower element. The fact that the building has survived nearly a century — including the devastation of World War II — makes it a rare and valuable example of early reinforced concrete commercial architecture in Tokyo.

Why It Was Designated a Cultural Property

The Echisou Building was registered as a National Registered Tangible Cultural Property (国登録有形文化財) on February 27, 2023. Japan's cultural property registration system aims to preserve buildings that are over 50 years old and that demonstrate characteristics of their era, possess outstanding design, or would be difficult to replicate today.

The Echisou Building meets these criteria on multiple counts. As a Taisho-era reinforced concrete structure, it exemplifies the early adoption of modern building techniques in Japanese commercial architecture. Its decorative exterior — particularly the dentil molding along the roofline and the arched headers above the windows — reflects the Western-influenced architectural styles that were fashionable during this period. Positioned on a prominent corner lot, the building functions as an eye-stop (アイストップ) that defines and enhances the character of the surrounding streetscape.

Architectural Highlights

The Echisou Building is a reinforced concrete structure of three stories with a partial fourth-story tower element (塔屋), covering a building area of 236 square meters. Its most striking features include:

• Dentil Cornice: The roofline is adorned with a row of dentil molding (デンティル), a decorative element borrowed from classical Western architecture. This detail gives the building a refined, dignified appearance.
• Arched Window Headers: The windows on the upper floors are framed by decorative arches, adding rhythmic elegance to the facade.
• Rounded Corners: The building's corners are gently curved rather than sharply angled, softening the overall silhouette and creating a sense of warmth and approachability.
• Raised Southeast Corner: The southeast corner of the building is elevated one story higher than the rest, creating a tower-like accent that gives the structure a distinctive asymmetrical profile when viewed from the street.
• White Mortar Finish: The exterior walls are finished in white mortar, giving the building a clean, luminous appearance that stands out amid the surrounding modern structures.

While the designer and builder remain unrecorded, the quality of the decorative work and the thoughtful massing of the building suggest the involvement of a skilled architect familiar with Western design conventions.

Visiting the Echisou Building

The Echisou Building is located at 2-39-7 Hongo, Bunkyo-ku, Tokyo, on a corner lot along Hongo-dori, just south of the Hongo-sanchome intersection. As the building is a privately owned commercial property, the interior is generally not open to casual visitors. However, the building's greatest charm lies in its exterior, which can be freely admired from the surrounding streets.

The building is just a one-minute walk from Exit 1 of Hongo-sanchome Station on the Tokyo Metro Marunouchi Line and the Toei Oedo Line, making it one of the most accessible heritage buildings in the city. A stroll along Hongo-dori in either direction will reveal a wealth of other historic buildings, making this an ideal area for an architectural walking tour.

Nearby Attractions

The Hongo district is one of Tokyo's richest areas for historic architecture and cultural landmarks. Within walking distance of the Echisou Building, visitors can explore a number of other notable sites:

• Sakae Building (さかえビル): Another Registered Tangible Cultural Property on Hongo-dori, completed in 1934 (Showa 9), with elegant early Showa commercial design.
• Yumimachi Hongo Church (弓町本郷教会): A Registered Tangible Cultural Property dating from 1926, this concrete block church is a fine example of Taisho-era religious architecture.
• Hongo Central Church (本郷中央教会): A Registered Tangible Cultural Property completed in 1929, this former Methodist chapel features striking Romanesque Revival styling.
• University of Tokyo Hongo Campus: Just a short walk north, the main campus of the University of Tokyo is home to dozens of pre-war Gothic Revival campus buildings, including the iconic Yasuda Auditorium (安田講堂).
• Yushima Seido (湯島聖堂): A Confucian temple originally established in 1690, with reinforced concrete buildings designed by the renowned architect Ito Chuta in 1935.
• Kyu-Iseya Shichiten (旧伊勢屋質店): A Registered Tangible Cultural Property famous as the pawnshop frequented by the celebrated Meiji-era novelist Higuchi Ichiyo.