A 1923 bank building in Nihonbashi's former financial district, converted by Claesson Koivisto Rune into a 20-room hotel where the original banking hall's soaring ceilings now house Caveman, a cocktail bar and restaurant whose drinks alone justify a visit. The Swedish-Japanese design collaboration produced rooms of restrained warmth — natural oak, muted textiles, Japanese joinery details — inside a concrete shell that still reads as institutional architecture. The Kabutocho neighborhood around it has transformed from Tokyo's abandoned Wall Street into a quiet cluster of specialty coffee, wine bars, and small restaurants, and K5 is both product and catalyst of that change.
Location
Nihonbashi, Tokyo
Insider Intel
A drink at Caveman bar is essential — the cocktails use Japanese spirits and seasonal ingredients with serious craft. Book a Loft room for the double-height ceiling that reveals the building's banking-hall proportions. The breakfast by Caveman is excellent. Use the hotel as a base for exploring Nihonbashi's emerging dining scene and the nearby Tsukiji Outer Market.
Year-round. The neighborhood is quieter than Shibuya or Shinjuku, which suits the hotel's character. Weekend evenings when Caveman's bar fills with locals. Autumn and spring for walking the Nihonbashi district.
Nihonbashi Kabutocho — a 5-minute walk from Kayabacho Station (Hibiya and Tozai Metro lines) or a 10-minute walk from Tokyo Station. Only 20 rooms, so book ahead. Rooms from approximately 25,000-45,000 yen per night. Caveman bar is open to non-guests and worth visiting independently. The neighborhood has specialty coffee (Switch Coffee, Unlimited Coffee), wine bars, and small restaurants within walking distance. Credit cards accepted.