Kanagawa Prefectural Government Building (King's Tower)

The Kanagawa Prefectural Government Building, affectionately nicknamed the King's Tower, is the senior member of Yokohama's celebrated Three Towers—King, Queen and Jack—three landmark towers rising from the historic Kannai district near the harbour. Completed in 1928 and designated a nationally Important Cultural Property, the King still functions as the working seat of the Kanagawa prefectural government, which makes it a rare example of a prewar civic monument that has never left active public service.

Architecturally the building is a confident piece of late-1920s design, blending art-deco geometry with a squat, powerful central tower topped by a distinctive stepped, temple-like crown. Its scale and solidity were meant to project the authority of prefectural government in the reconstruction years after the 1923 Great Kanto Earthquake, and the tower quickly became one of the defining silhouettes of the Yokohama waterfront. The nickname "King" reflects both its dominance among the trio and, according to the local playing-card legend, a numbering that pairs the three towers with the King, Queen and Jack of a suit.

The building's interest goes beyond its exterior. On open days visitors can step inside to see the preserved historic halls and, best of all, climb to a rooftop observation area—uniquely among the three towers, the King lets you stand on its roof and look out over the port, the Osanbashi Pier and the Minato Mirai skyline. There is a charming piece of local folklore attached to the trio: it is said that if you can see all three towers together from certain viewpoints, such as Osanbashi Pier, Zou-no-hana Park and Akarenga, your wish will come true, and spotting them has become a small Yokohama pilgrimage.

The King anchors the Kannai government quarter, a dignified area of early-twentieth-century public buildings laid out along the tree-lined Nihon-Odori avenue. Together with the Queen (the Yokohama Customs building) and the Jack (the Port Opening Memorial Hall), it forms a walkable trio that tells the story of Yokohama's rise as Japan's great gateway port.

The visiting experience is free and civic in character. Because it is a functioning government building, interior and rooftop access are offered on set open days, generally weekdays, and it is wise to check current arrangements before visiting; the exterior can be admired at any time and looks especially fine in late-afternoon light. A visit takes around half an hour, more if you climb to the roof. The ground floor is accessible, though older parts of the building have stairs.

To reach it, take the Minatomirai Line to Nihon-Odori Station, from which it is a three-minute walk into the Kannai district; JR users can approach from Kannai Station in a few minutes more. Combine the King with the neighbouring Queen and Jack towers, the Red Brick Warehouse and Zou-no-hana Park for a compact half-day tracing the civic and maritime heart of historic Yokohama.