Osaka Castle stone walls: a walking guide
Osaka Castle's walls are its real treasure. The stones were brought by boat from as far as Kyushu, some weigh more than 100 tonnes, and many still carry the marks of the families who cut them.
The park around the castle is free and open at any time, so you can walk the walls even when the Main Tower is closed.
Two castles, two kinds of wall
There have been two Osaka Castles on this spot. Toyotomi Hideyoshi began the first in 1583. After it fell in 1615, the Tokugawa shogunate buried it and built a new castle on top, starting in 1620. Sixty-four daimyo families, mostly from western Japan, were ordered to do the work, which took about ten years.
Every wall standing in the park today is Tokugawa work. Hideyoshi's walls survive only underground and in a few places nearby.
| Toyotomi walls (from 1583) | Tokugawa walls (from 1620) | |
|---|---|---|
| Stones | Natural stones, barely shaped, gaps filled with small stones (nozura-zumi) | Cut and shaped to fit with few or no gaps (uchikomi-hagi, kirikomi-hagi) |
| Size | Mostly small. 30 to 60 cm in the wall found in 1959 | Huge. Many stones weigh more than 100 tonnes |
| Marks | Mostly none | Crests of the daimyo families who supplied them |
| Where to see them | Toyotomi Stone Wall Museum, Dawn Center, Otemon Gakuin Elementary School | All around the park |
Inside the park
- The Octopus Stone (Takoishi), at Sakuramon Gate. The largest stone in the castle, just inside the gate to the inner bailey: 5.5 m high, 11.7 m wide, an estimated 108 tonnes. Map
- Toyotomi Stone Wall Museum. A wall of Hideyoshi's castle, buried by the Tokugawa and found in 1984. It still shows burn marks from 1615. Free with the Main Tower ticket. Guide
- Yamazato-maru marked-stone plaza. North of the Main Tower. Created in 1983 for the castle's 400th anniversary, it gathers stones with daimyo crests: leftovers found around the city and stones removed during repairs. Map
- Bomb damage on the Main Tower base. On the north and east faces of the tower base, stones were pushed out of line by a bomb that fell a few meters north of the tower in 1945. More
- Marked stones on the northeast inner moat and in the Yamazato-maru's hidden enclosure. Look closely at the wall faces for carved symbols.
- The "mystery wall" under the inner bailey. Found in 1959, it was the first clue that Hideyoshi's castle lay underneath. Not open to the public.
Outside the park, a short walk away
- Dawn Center, just northwest of the castle. A Toyotomi wall found during construction was rebuilt on the north side of the building, in the open along the road.
- Otemon Gakuin Elementary School, west of the castle. A Toyotomi wall found in 1984 can be seen from the street through a glass window, the "Otemon Stone Wall Gallery" opened in 2019.
- Karahori shopping street, southwest of the castle. It follows the line of the moat around Hideyoshi's outer town.
- Honmachi-bashi and Kōrai-bashi bridges on the Higashi-Yokobori canal, the western edge of Hideyoshi's outer town.
Words you will see on the signs
| Kokuin-ishi | A stone carved with a daimyo family's crest or symbol |
| Ya-ana | A row of wedge holes, cut to split the rock |
| Zannen-ishi | "Stone of regret": a castle stone that was cut but never used |
| Sangi-zumi | Corner stones laid long side and short side in turn, to keep the corner strong |
| Nozura-zumi | A wall of rough natural stones, the Toyotomi style |
| Ishi-chōba | A quarry and work yard run by one daimyo family |
Where the stones came from
Most Tokugawa stones are granite. They came from the Ikoma and Rokko mountains near Osaka, from islands in the Seto Inland Sea such as Shodoshima, and from Yukuhashi in Kyushu, and they traveled to Osaka by boat. Hundreds of stones that never made the trip still lie at the old quarries. On Shodoshima alone, more than 1,600 leftover stones remain at one national historic site.
Walk past all 13 original Edo-period buildings
Questions
Who built the stone walls of Osaka Castle?
The walls you see in the park today were built by the Tokugawa shogunate from 1620. Sixty-four daimyo families were ordered to supply the stone and labor, and the work took about ten years. Toyotomi Hideyoshi's earlier walls lie buried underground.
Where can I see Hideyoshi's original stone walls?
At the Toyotomi Stone Wall Museum inside the park, and from the street at the Dawn Center and at Otemon Gakuin Elementary School, both just west of the castle.
What are the marks carved on the stones?
They are kokuin: crests and symbols carved by the daimyo families who supplied the stones, to show whose stones were whose.
Where did the stones come from?
From the Ikoma and Rokko mountains near Osaka, from islands in the Seto Inland Sea such as Shodoshima, and from as far as Kyushu. Many stones weigh more than 100 tonnes.
Written by Kyoya Fujioka. Facts come from the Osaka Castle Museum map of stone wall sites (issued May 2026). We will add the weights and exact spots of the largest stones after checking the signs on site.