From the free observatory at Tokyo City Hall you look straight down at a strip of low buildings beside a park. Until 1968 that strip was a pond with teahouses, and for forty years it was a geisha quarter. Across the station, the garden you paid ¥500 to walk in once grew the chili that seasoned Edo's soba.
Jūnisō 十二社Naitō tōgarashi 内藤とうがらしFacts checked October 2026
You have been up the Tokyo Metropolitan Government Building (東京都庁) for the free view, probably at dusk. You have walked Shinjuku Gyoen in cherry season or under the autumn leaves. Both are on every list. This piece is about what was on that ground before: a reservoir that became a resort, a resort that became a pleasure quarter, and a samurai estate whose chili fields turned the area red.
Why this rather than another garden or another view? Because almost nothing of it is left, and that is the point. You walk the street names, a dip in the road, a shrine with a 200-year-old water basin, and a temple whose main statue is shown two days a year. In return you understand Shinjuku as a place that existed before the station. You give up spectacle. Most of the sights are under your feet.
Thread one · the pond
A shrine for twelve gods十二社熊野神社 · Jūnisō Kumano Jinja
Kumano Jinja (熊野神社) sits in the northwest corner of Shinjuku Central Park, a short walk west of City Hall. The shrine's founding legend says a merchant named Suzuki Kurō, from the Kumano region of Kii, brought the twelve deities of the three Kumano shrines here in 1403. Twelve shrines in one: jūnisha, written 十二社, which local people came to read "Jūnisō".
Hiroshige put it in his One Hundred Famous Views of Edo as No. 50, published in 1856: the shrine above a pond, with tea stalls and a two-storey restaurant. The shrine is still here. The pond and restaurants are not.
Look for what the shrine kept. A stone marked 十二社 from 1851 and a stone water basin from 1820 inscribed by the comic poet Ōta Nanpo are both protected by Shinjuku City. A pair of guardian dogs is from 1727. There are votive plaques given by kabuki actors in 1764, 1773 and 1847, which tells you who was coming out here for pleasure.
At the shrine office, if you collect stamps: 御朱印をお願いします (goshuin o onegai shimasu).
Getting there: Tochōmae Station (都庁前駅), Toei Ōedo Line, Exit A5 · about 5 min walk · 西新宿2-11-2
When: Grounds open 24 hours; office 9:00–16:30. Annual festival on the third weekend of September (19–20 September in 2026).
Reality check: Seasonal limited stamps are pre-written slips only. Hiroshige's view no longer lines up: the land he drew dropping to water is now a road.
From the observatory, look west-southwest past the park. The road with low buildings on its far side runs along the old shoreline.
From reservoir to resort十二社池 · Jūnisō pond
The pond started as irrigation. In 1606 two reservoirs were dug west of the shrine; the large one ran about 126 ken north to south, roughly 230 metres, and was narrow. In 1667 a feeder channel for Edo's Kanda water supply was cut past the shrine, and where it dropped off the bluff it made a waterfall.
A pond, a waterfall and a shrine, a short walk west of the Kōshū road: by the late Edo period it was a summer outing for people from the city. Teahouses lined the shore. The rakugo master San'yūtei Enchō set his ghost story Kaidan Chibusa Enoki at the Jūnisō falls.
Then the city needed water. Building the Yodobashi water purification plant buried the falls in the 1890s, and the plant began supplying Tokyo on 1 December 1898. Clean water also brought a camera-film factory, Konishiroku, which ran here from 1902 to 1963. When the plant closed in 1965, its site became the skyscraper district. The pond was filled in July 1968 under the sub-centre plan, the same year Shinjuku Central Park opened next door.
You can still feel the edge. Walk south along Jūnisō-dōri (十二社通り) from the shrine and the road dips gently. A Shinjuku local-history archive marks that dip as part of the old pond site.
Getting there: Start at Kumano Jinja and walk south along Jūnisō-dōri, 10–15 minutes
When: Daylight. It is a residential street.
Reality check: No official sign on the street marks the pond. You are reading a slope.
One strip of ground, five uses. Only the shrine runs through every layer.
The geisha quarter you can only read十二社花街 · Jūnisō kagai
Victory in the Russo-Japanese War in 1905 turned the teahouses into large ryōtei restaurants, and by 1911 "Jūnisō" was known as a pleasure quarter. It got its official designation in the early 1920s; sources disagree on the year. The shrine puts its peak at about 100 restaurants and teahouses and about 300 geisha.
The area burned in the air raid of 25 May 1945 and came back on a smaller scale. In 1953 a hall for practising the arts was built on the shore, with a registry office for the geisha; that building is now an apartment block. A natural hot-spring bathhouse ran from 1957 to March 2009. No source gives a date for the last geisha.
What survives is the street names. A neighbourhood association map published with Shinjuku City lists twelve named slopes. Three of them tell the story:
池の段坂Ike-no-dan-zaka · "pond-step slope", running west off Jūnisō-dōri just south of the shrine
三味線坂Shamisen-zaka · named for the shamisen
黒塀坂Kurobei-zaka · "black-fence slope", the fences of the ryōtei
Getting there: Nishi-Shinjuku 4-chōme, west of Jūnisō-dōri
When: Any time. It is quiet streets and apartment blocks.
Reality check: The slope names on the map are not all signposted. Bring the kanji above and compare them with the small markers you find.
The waterfall that isn't the waterfall新宿ナイアガラの滝 · Shinjuku Niagara Falls
Inside Central Park, near the shrine, is a wide artificial cascade called Shinjuku Niagara Falls (新宿ナイアガラの滝), finished in 1982 and lit in summer. Some travel sites call it a memorial to the Jūnisō falls. Shinjuku City's own material does not say so. Enjoy it for what it is: a 1980s park feature close to where the real falls once were.
Getting there: Shinjuku Central Park, 2 min from Kumano Jinja
When: Best on a summer evening when it is lit
Reality check: Not a reconstruction. Nearby is a stone marking the birthplace of the Japanese photographic industry, for the film factory.
Thread two · the chili
A samurai estate measured by a horse内藤家下屋敷 · the Naitō estate
In 1590 Tokugawa Ieyasu gave land west of Edo to his retainer Naitō Kiyonari. The Ministry of the Environment, which runs Shinjuku Gyoen, tells the story that Kiyonari was allowed whatever he could ride around on horseback, and came away with about 70 hectares. Much of that is today's garden.
A post town grew up beside the estate on the Kōshū road around 1698–99. It was called Naitō-Shinjuku, "the Naitō new post town", and that is where the name Shinjuku comes from. Shinjuku Station opened in 1885 as 内藤新宿駅.
On the estate and in the farms around it, people grew a chili called yatsufusa (八房), whose pods grow in clusters pointing up. Edo had a soba craze; the revival project cites 3,700 soba shops, and soba needs a spice. The fields around Naitō-Shinjuku, the project says, looked like a red carpet at harvest. Street sellers cried "Naitō-Shinjuku's yatsufusa, roasted chili".
Two hundred years of red fields, then nothing. The whole revival fits into the last sliver of the line.
The chili came back内藤とうがらし · Naitō tōgarashi
The chili disappeared as the fields became town, and as the hotter takanotsume variety took over. In 2010 a local project led by Narita Shigeyuki went looking for yatsufusa seeds and started growing them again. Tokyo recognised it as an Edo-Tokyo traditional vegetable in 2013, and it became a registered regional trademark in 2018. It is milder than most Japanese chili, with more flavour than heat.
You will not find it in a supermarket at random. The project lists its stockists, among them PLAY THE EARTH LABORATORY near Shinjuku Gyoen and, oddly, the Shinjuku Musashinokan cinema. A chili oil made with it was certified as a Shinjuku specialty in March 2026. A Naitō tōgarashi fair is held in October; the 2026 dates had not been published when this was checked.
In a shop near the garden, ask: 内藤とうがらしはありますか (Naitō tōgarashi wa arimasu ka).
Getting there: Check the stockist list on the project site (naito-togarashi.tokyo) before you set out; addresses and hours change
When: The fair is in October. Stocked products are on the shelf the rest of the year.
Reality check: Whether you can see the plant growing inside Shinjuku Gyoen could not be confirmed. Don't plan your visit around it.
The Naitō family temple太宗寺 · Taisōji
On the north side of the garden, Taisōji (太宗寺) is the Naitō clan's family temple. The grave of Naitō Masakatsu is a Shinjuku City historic site. The temple also holds a large seated Enma, judge of the dead, and a Datsueba, the old woman who strips the clothes from souls at the river of the underworld. Both statues are city-designated.
The Enma is the reason locals know the temple. A woodblock print from 1847 in the Edo-Tokyo Museum collection reports an incident in which someone gouged out the statue's eyes. The hall is opened only on 15–16 January and 15–16 July.
Getting there: 新宿2-9-2, north of Shinjuku Gyoen. Nearest is Shinjuku-gyoemmae Station (新宿御苑前駅) on the Marunouchi Line; check the walk on a map.
When: Grounds by day. Enma hall open 15–16 January and 15–16 July only.
Reality check: On the other 361 days you see the outside of the hall. The grave and grounds are still worth ten minutes if you are at the garden.
West side in the morning, east side in the afternoon. The station sits between the two threads.
The honest part
There is very little to see. The pond is gone, the falls are gone, the geisha quarter is apartment blocks, and the chili fields have been town for 150 years. If you do not enjoy reading a place from street names and a change in level, this will feel like a walk past ordinary buildings.
Several things could not be pinned down. The geisha district's designation year varies between sources, and nobody records when it ended. The chili fair's 2026 dates were not out. Whether the garden shows growing chili is unconfirmed. The stockist list changes.
Shinjuku Gyoen is closed on Mondays except in spring and early November, and from October to mid-March it closes at 16:30. City Hall's south observatory closes on the first and third Tuesdays; the north one then stays open instead. Taisōji's Enma hall is shut 361 days a year. Plan the day so the garden is not the thing you arrive late for.
If you only have one day
Tokyo Metropolitan Government Building, south observatory opens. Find the park and the low strip beyond it.
Kumano Jinja: the 1851 stone, the 1820 water basin, the 1727 dogs.
Walk south on Jūnisō-dōri. Find 池の段坂 on the right.
Back through Central Park past the Niagara Falls. Lunch in Nishi-Shinjuku.
Marunouchi Line to Shinjuku-gyoemmae. Shinjuku Gyoen (not Monday).
Look for Naitō tōgarashi at a stockist near the garden.
Taisōji. Finish at the Shinjuku 3-chōme crossing, the old Oiwake fork where the Kōshū and Ōme roads split.
If you are running late, drop the Niagara Falls and the chili shop. Keep Taisōji: the Naitō graves close the loop the horse story opened.