Maruoka Castle: Kasumi Castle with Japan's Oldest Existing Castle Tower

On a low hill stands a plain yet sturdy keep with an aged patina. Maruoka Castle in Sakai City, Fukui Prefecture, is a precious castle whose surviving keep conveys the appearance of an early era to this day. Said to have been built in the Warring States period, the keep has survived many ages with a simple and powerful bearing. In spring it is wrapped in cherry blossoms, and its dreamlike form floating in the haze has earned it the nickname "Kasumigajo" (Mist Castle).

Highlights

Maruoka Castle is a hilltop castle rising in Maruoka Town, Sakai City, Fukui. Its keep is said to have been built around 1576 by Katsutoyo, a nephew of Shibata Katsuie, a retainer of Oda Nobunaga, and as one of Japan's surviving keeps it is designated a national Important Cultural Property. Its simple, rugged construction with little ornamentation preserves the features of a Warring States period castle. A major characteristic is the roof, which uses cold-resistant stone tiles made of Shakudani stone.

You can tour the interior of the keep, and climbing the steep stairs to the top floor rewards you with a sweeping view over the town of Maruoka. Seeing the old wooden framework and construction techniques of the era up close is another appeal. The castle also carries anecdotes tied to Warring States commanders and the story of "Ippitsu Keijo," known as Japan's shortest letter, which delights history lovers.

Enjoying the Seasons

Maruoka Castle is also called "Kasumigajo." This is said to derive from a legend that haze veiled the castle during battle, hiding it from view. In spring many cherry trees bloom around the castle, and the keep wrapped in blossoms seems to float in the mist. Selected among Japan's 100 Best Cherry Blossom Spots, it is a famous cherry blossom site, and the illuminated night blossoms paired with the keep are exceptionally beautiful. The fresh greenery of early summer, autumn foliage, and snow-dusted winter each have their own charm.

Access and Essentials

One thing to know before you go: the castle keep is under restoration. Sakai City's cultural affairs division announced on 28 August 2026 that the keep interior is closed to visitors from 1 to 18 September 2026 and again from 9 to 30 November 2026 (provisional), with the third floor closed from 26 to 30 October. The overall access-restriction period runs from 1 August 2026 to November 2027 (provisional). The prefectural tourism federation gives mid-November as Maruoka Castle's peak foliage, which falls entirely inside the November closure. The castle's own website carries a page title saying it cannot be entered at all during the works, which conflicts with Sakai City's dated schedule, so call the Maruoka Castle management office on 0776-66-0303 before you travel.

The official access guidance is: about 60 minutes by Keifuku bus from Fukui Station; Fukui Station to Maruoka Station on the Hapi-Line then about 30 minutes by bus; about 30 minutes by taxi from Fukui Station; about 20 minutes by Keifuku bus from Ashihara-Onsen Station; or about 10 minutes on ordinary roads from Maruoka IC on the Hokuriku Expressway. Parking is free at both the Maruoka Castle car park (40 cars) and the north car park of the Ippitsu Keijo letter museum (140 cars and 4 buses), open 6:30-20:00; the castle asks visitors not to park or idle on the surrounding streets. Admission is 450 yen for adults (360 yen for groups of 30 or more) and 150 yen for children of elementary and junior high school age (120 yen for groups), with a 50 percent reduction for holders of a disability certificate. Opening hours are 8:30-17:00 (last entry 16:30), open all year. Because the keep is a surviving wooden structure, the stairs are very steep, so use the handrails and watch your footing when going up and down.

Practical Travel Notes

The best season is spring when cherry blossoms are in full bloom (typically early April), but it can be visited year-round. The cherry blossom season is especially crowded, so early morning allows a more relaxed visit. Touring the keep itself takes about 30 minutes to an hour, and half a day is enough including a stroll around the castle. Nearby are Tojinbo, Awara Onsen, and the port town of Mikuni, and since it is close to central Fukui, it is easy to plan a day trip combining these. The budget is reasonable for admission and a nearby stroll, and pairing it with a stay at Awara Onsen is also recommended.

A Word of Advice

The main draw of Maruoka Castle is the surviving keep itself, which preserves the look of an earlier age. Be sure to savor the view from the top floor after climbing the steep stairs and take in the plain, rugged construction up close. Visiting in comfortable shoes is reassuring. During cherry blossom season, do not miss the evening illumination. At this famous Hokuriku castle, feel the quiet passage of history.

📚 Sources

The information here is based mainly on the public guidance from Sakai city and its tourism association. The history as an original surviving keep and national important cultural property, the cherry blossoms selected among Japan's 100 best cherry blossom sites, and the story of the shortest letter in Japan, Ippitsu Keijo, are also useful references. Because the admission and opening hours and whether the cherry blossoms are lit up may change, please confirm the latest details on the official Sakai city or Maruoka Castle information before you visit.

Visitor Checklist

• Estimated time needed: About 30 minutes to 1 hour to view the keep, and half a day is enough including a stroll around the castle.
• What to bring: Because it is an original surviving keep, the stairs are very steep; use the handrails and watch your footing when going up and down. Visiting in comfortable walking shoes is reassuring. Early morning is comfortable, as the cherry blossom season is especially crowded.
• Suggested route: After climbing the keep for a view over the castle town, combine your trip with Tojinbo, the port town of Mikuni, and Awara Onsen, all reachable by car, which makes it easy to tour the sights in a day from close to central Fukui city.