How to Spend a Rainy Day on Yakushima: Recommended Tours and Tips for Dealing with Rain
What should you do if it rains on Yakushima?
A.
If it's just a light rain, we recommend joining a hiking or kayaking tour designed for rainy days so you can enjoy the moss-covered forest, which glistens when wet. On days when heavy rain is severe enough to trigger a weather advisory,Yakushima World Heritage CenterLet's spend some time checking out the exhibits at the Yakusugi Nature Museum!
Yakushima Island is famous for its "rain
This section provides a thorough explanation of rainy days!
Yakushima is also famous for its abundant rainfall.Yakushima Island has 35 days of rain in a month."It's even been compared to..."
This column summarizes the reasons why it rains so much on Yakushima, as well as tours and sightseeing spots you can enjoy even on rainy days, and recommended clothing and items to bring to stay dry.
Even if rain is in the forecast, you can still enjoy your trip to Yakushima to the fullest if you know about it in advance!
Actually,The moment when the forests of Yakushima shine brightest is after the rain.It is.
Rain is the “source of life” that nourishes moss and Yakusugi cedars, and there are many sights on Yakushima that can only be seen when it’s raining.
◆For those who want to know about tours and sightseeing spots that are fun even on rainy days
◆For those who want to know if the tour will take place even if it rains
◆For those who want to know what to wear and what to bring on rainy days
Click here to see the ranking of popular tours in Yakushima.
Fun on a rainy day!
▼Click here for recommended indoor activities on Yakushima▼
Click here for indoor activities on Yakushima
Why Does It Rain So Much on Yakushima?
Annual Precipitation and the Meaning of “35 Days a Month”
Yakushima is one of the rainiest islands in Japan.
Here, we’ll explain why it rains so much, the actual amount of rainfall, and the origin of the saying, “It rains 35 days a month.”
Why It Rains So Much on Yakushima
Around Yakushima, there areThe Warm Kuroshio Current...is flowing, and a lot of water vapor is rising from the ocean.
That moist air collides with the high mountains—including Mt. Miyanoura (1,936 m), the highest peak in Kyushu—where it rises, cools, and turns into rain.
The fact that high mountains—sometimes called the “Alps of the Sea”—jute out from the ocean is the reason why Yakushima gets so much rain.
Annual precipitation in Yakushima
According to the Japan Meteorological Agency's long-term average (1991–2020), the annual precipitation on Yakushima (Koseta) isApproximately 4,650 mmIt is.
That's about three times the size of Tokyo—one of the highest numbers in Japan!
Furthermore, the more you go into the mountains, the more it rains.
◆Flat terrain: 4,000 mm or more
◆Mountainous areas: 8,000–10,000 mm
*Information on lowland and mountainous areas is taken from the “Yakushima World Heritage Site Management Plan.”
In mountainous areas such as Jomon Sugi and Shiratani Unsuikyo, it can sometimes be raining even when the weather is clear at the base of the mountain.
On the day of your hike, be sure to prepare based on the expected mountain weather.
The Origin of the Saying "It Rains 35 Days a Month"
The phrase “It rains 35 days a month” comes from a novel by the author Fumiko Hayashi"Floating Clouds"It is known as a passage that appears in [...].
In the story, when the characters arrive on Yakushima, it is mentioned that “it rains for thirty-five days out of every month.”
Of course, there aren't actually 35 days in a month—it's just a figure of speech used to describe how much it rains.
The rainiest time of year is June, during the rainy season.
The rainy season on Yakushima is, as usual,Late May through mid-JulyIt is.
According to the Japan Meteorological Agency's long-term averages, June is the rainiest month of the year, with approximately 860 mm of rainfall.
On the other hand, August—once the rainy season is over—is the driest month of the year.
During the rainy season,The moss glistens all over the placeIt's also the season when you can see lush forests.
Another appealing aspect is that there are relatively few tourists, so you can take a leisurely stroll through the quiet forest!
Let's take a walk through the mossy forest!
▼Click here for the Shiraya Unsuikyo Trekking Tour▼
The column below provides detailed information on the weather and recommended clothing for each month.
↓Click here to read the article.
Fun even when it rains!
5 recommended activities in Yakushima
It is precisely because of the high rainfall that Yakushima has retained its lush forests and rivers, allowing visitors to encounter rare plants and animals.
Here are five recommended activities you can enjoy even on rainy days!
Rain or shine!
▼Click here for popular tours on Yakushima▼
Held in Yakushima!
Click here for recommended tour ranking
trekking
On Yakushima, where about 90 percent of the island is covered by forest,Trekking through mountains and forests is popularactivities!
Among them, trekking tours to Taikoiwa, Shiratani Unsui Gorge, Jomon Cedars, and Yakusugiland are the most popular.
Most trekking tours on Yakushima Island are scheduled to take place even on rainy days.
Enjoy a rain-soaked forest scene.That's the real thrill! Be sure to join one of our trekking tours to fully experience all that Yakushima has to offer!
Click here for Yakushima hiking and trekking tours↓
Yakushima mountain climbing and trekking tours
Click here for popular plans
Canoe (Kayak)
Canoeing is an activity in which participants paddle along the surface of the water and enjoy exploring the river or ocean.
The rivers of Yakushima are surrounded by forests, which means that they are not affected much by rain and wind!
Come experience canoeing on a rainy day—get completely soaked—and make some fun memories on Yakushima.
Click here for popular canoe tours on Yakushima ↓
Eco-tour (island sightseeing)
Yakushima Island is rich in eco-tourism resources,Tours of mountains, forests, and other natural areasare abundant!
Popular SpotsYakusugilandThere are well-maintained walking trails, so it's easy to walk around!
You’ll see virgin forests, trees, and mountain streams glistening in the rain, and you might even spot some giant trees standing about 20 meters tall!
In addition, island sightseeing includes a visit to Chihiro Falls and Okawa Falls on a day of heavy rain,The spectacle of water flowing down in a mighty stream.You can see it here!
In this way, eco-tours that can be enjoyed only on rainy days are a unique attraction of Yakushima!
Click here for popular eco-tours on Yakushima ↓
snorkeling
Even if it rains, a little rain will not significantly affect the inside of the ocean!
The slightly darker it is, the easier it is to find small fish that are hiding,Fantastic UnderwaterYou can better enjoy the
Of course, you can take underwater photos without any problems!
Click here for snorkeling tours on Yakushima ↓
Yakushima Snorkeling Tour
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Click here for more information on sea turtles in Yakushima↓
SUP
SUP is an activity where you stand on a board, paddle, and move across the water!
Even for beginners, standing on a board on the water isn't that hard!
Time Flows on YakushimaA spacious environmentEnjoy SUP to your heart's content.
Click here for SUP tours on Yakushima ↓
Is it okay to go hiking on a rainy day?
Important Notes on the Jomon Sugi and Shiratani Unsuikyo Gorge
One of the great things about trekking on Yakushima is that you can enjoy it even on rainy days.
However, the hike may be canceled in the event of heavy rain, or rising water levels may make it impossible to cross the stream. We’ve compiled some key points you should know before setting out.
We're open even on rainy days!
▼Click here for popular hiking tours▼
Will the tour take place even if it rains?
Under what circumstances is an event canceled?
Trekking tours on Yakushima are,The event will go on even if it's drizzlingThe following is a summary of the results of the project.
There are many tours, like the Jomon Sugi Tour (No. 38), that state, “The tour will generally take place even in the rain.”
However, in the event of heavy rain, typhoons, or thunderstorms, or when warnings are issued or roads are closed, the tour may be canceled or the route changed at the guide’s discretion.
If an event is canceled due to bad weather, many plans offer no cancellation fee or a full refund, so be sure to check the plan page before making a reservation.
Click here for a list of plans that are okay on rainy days
Shiratani Unsuikyo is closed due to high water levels
There may be times when you can't cross the stream
At Shiratani Unsuikyo, there isA Stream Without a BridgeThere are several such spots, and when it rains heavily, the water rises and makes it impossible to cross.
The golden rule is: when the water level is high, don't try to cross—wait until the water recedes.
In addition, Shiratani Unsuikyo and Yakusugi Land are,The park closes when an alert is issued.(The park will close even if it isn't raining.)
Even when a weather advisory is in effect and the 24-hour rainfall exceeds 220 mm, some courses may be restricted or the park may close.
Shiratani Unsuikyo opened on October 18, 2026, but due to the effects of the typhoon, parts of the Yayoi-sugi Trail and other areas remain closed to the public.
Be sure to check the latest information in the announcements from the Yakushima Recreation Forest Conservation and Management Council before heading out.
Feel at ease with a guide!
▼Click here for tours of Shiratani Unsuikyo▼
Click here for Hakutani Unsui Gorge Trekking Tour
Click here for more information on Shiratani Unsuikyo ↓
The round-trip hike to the Jomon Sugi is about 22 km.
Walking for a long time in the rain
To get to the Jomon Sugi, start from the Arakawa trailheadApproximately 22 km round trip・It takes more than 9 hours (according to the Ministry of the Environment's guidelines).
Since you'll be walking in the rain for a long time, be sure to bring rain gear and waterproof shoes.
From March through November, private vehicle restrictions are in effect, so visitors must take the hiking bus from the Yakusugi Nature Center to the Arakawa Trailhead.
Since the mountain bus may be suspended due to bad weather or road conditions, it’s a good idea to check the service status the day before or on the day of your trip.
Led by a certified guide!
Click here for Jomon Cedar trekking tours
Click here for information on preparing for the Jomon Sugi trek ↓
Guided tours are especially recommended on rainy days
On rainy days, the ground can get slippery, and there are often many things—such as rising water levels in streams or trail closures—that you can only find out on the day itself.
If you're with a local guide, they can adjust the itinerary based on the conditions on the day.Choose a courseThey'll give it to you, so you don't have to worry.
Since you'll also learn about the unique sights of the moss and forest that are best seen on rainy days, why not consider taking a guided tour?
Yakushima mountain climbing and trekking tours
Click here for popular plans
Recommended Sightseeing Spots for Rainy Days
On days when heavy rain prevents you from going into the mountains, we recommend visiting indoor facilities where you can learn about Yakushima’s nature.
Here, we’ll introduce two tourist spots you might want to visit on a rainy day. We hope you find this helpful!
↓Click here to read the article.
Yakushima World Heritage Center
The Yakushima World Heritage Center is,Free admissionIt is a facility operated by the Ministry of the Environment where visitors can learn about the nature and culture of Yakushima.
This guide provides a comprehensive overview of Yakushima’s World Natural Heritage Site and National Park, covering everything from the island’s natural history and environmental conservation efforts to hiking etiquette and rules.
If you stop by before your hike, your walk through the woods will be even more fun!
◆Hours: 9:00 a.m. to 5:00 p.m. (Last admission at 4:30 p.m.)
◆Closed: December 29–January 3
◆Admission: Free
Yakusugi Nature Center
Yakusugi Nature Museum is a museum where visitors can learn about the history and nature of Yakusugi cedar.
Through exhibits of actual specimens and videos, you can easily learn about the charms of Yakushima’s forests.
Heading to the Jomon SugiHiking Bus Departure and Arrival PointsSo, we recommend stopping by before or after your hike!
◆Hours: 9:00 a.m. to 5:00 p.m. (Last admission at 4:30 p.m.)
◆Closed: The first Tuesday of every month (except May and August), and December 29 through January 1
Let's Learn About the Forest Even on Rainy Days!
▼Click here for tours of Yakusugi Land▼
Yakusugi Land Trekking Tour
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Preparing for Rain on Yakushima
Clothing and Belongings
When traveling to Yakushima, it’s essential to be prepared for rain even if the forecast calls for sunny weather.
Many trekking tours list rain gear, hiking boots, and a backpack cover as required items.
Choose rainwear that comes as a two-piece set
Rain gear is,Two-piece setLet's prepare the forms.
Depending on the tour, some operators recommend Gore-Tex products, which offer excellent waterproofing and breathability.
Since it leaves both hands free—unlike a poncho or umbrella—you can walk safely even on slippery mountain trails.
The shoes are waterproof hiking boots.
On the mountain trails of Yakushima when it rains, the muddy ground and wet tree roots can make it easy to slip.
The shoes are waterproof.trekking shoesis recommended.
Some tours, such as the Jomon Sugi Tour, require waterproof shoes, so be sure to check the details in advance.
Items That Are Handy to Have
On rainy days, it’s a good idea to bring the following items with you.
◆Waterproof bags and plastic bags (for storing smartphones and a change of clothes)
◆Towel
◆Clothes to Change Into for the Trip Home
◆Waterproof Cameras
The column below provides detailed information on what to wear and what to bring for each season.
↓Click here to read the article.
During Heavy Rain or Typhoons
Things to Check
On Yakushima, heavy rain can occur due to typhoons or weather fronts.
In September 2026, there was record-breaking heavy rain that triggered a special landslide warning. Be sure to check the following two items before your trip and on the day of your trip.
Weather Alerts and Hiking Trail Closures
First, the Japan Meteorological Agency'sAlerts and AdvisoriesLet's check that.
Information on the opening status of Shiratani Unsuikyo and Yakusugi Land is provided by the Yakushima Recreation Forest Conservation and Management Council, while information on hiking trails in the mountainous areas—including the Jomon Sugi—is provided by the Yakushima Mountain Area Conservation and Utilization Council.
You can check for road closures by looking at the road restriction information provided by Kagoshima Prefecture and Yakushima Town.
Flight and Ferry Cancellations
During heavy rain or typhoons,Flight and ship cancellationsSometimes I do that.
The final decision on whether high-speed boats (Toppi and Rocket) will operate is made one hour before departure, and in case of rough weather, the departure and arrival points may change from Awa Port to Miyanoura Port.
Since the Ferry Yakushima 2 may operate under "conditional departure" during inclement weather, be sure to check the operating status of each company well in advance.
↓Click here to read the article.
Rain on Yakushima Island
Frequently Asked Questions (FAQ)
This is because moist air rising from the warm Kuroshio Current collides with high mountains, such as Mt. Miyanoura (1,936 m), and turns into rain. Annual rainfall exceeds 4,000 mm even in lowland areas, and reaches 8,000 to 10,000 mm in mountainous regions.
It doesn't rain every day. The saying "It rains 35 days a month" is a figure of speech used to describe how much it rains. According to the Japan Meteorological Agency's long-term averages, August—after the rainy season ends—is the month with the least amount of rainfall in the year.
It’s okay to go if it’s just a light rain. Many Jomon Sugi tours are scheduled to take place “even in the rain, as a general rule.” However, since the round-trip hike is about 22 km and takes more than 9 hours, be sure to bring a two-piece rain suit and waterproof shoes. The tour will be canceled if a weather warning is issued or if the roads are closed.
If a tour is canceled due to inclement weather, many plans offer a full refund with no cancellation fee. However, policies vary by plan—for example, some do not offer refunds for itinerary changes made after departure—so please check the plan details page before booking.
On mountain trails, we recommend rain gear that leaves both hands free. Since the ground can be slippery, be sure to bring a two-piece rain suit and a backpack cover instead of an umbrella.
During the rainy season, from late May to mid-July, June in particular is the rainiest month of the year, with approximately 860 mm of rainfall (based on the Japan Meteorological Agency’s average) over the course of the month. Heavy rains can also occur from summer through fall as typhoons approach.
summary
In this article, we discussed the rain on Yakushima, including why it rains so much, the amount of rainfall, and tips on how to spend rainy days and prepare for the rain.
If it's just a light rain, it's okay on rainy daystourSo let's enjoy the moss-covered forest, glistening in the rain.
On days with heavy rain or weather warnings, it’s important to spend your time at the World Heritage Center or the Yakusugi Nature Museum and avoid venturing into the mountains.
Be sure to pack rain gear and waterproof shoes so you can experience the magical natural beauty of Yakushima, nurtured by the rain!
▼Click here for articles to read in conjunction with this article.
![[Yakushima · Private Tour] Led by a Female Guide! A Relaxing One-Day Forest Tour to Recharge Among Moss and Yakusugi Cedars](https://yakushima-tour.com/wp-content/uploads/2020/01/a0e0857e7f1ee70e49fee427cac12402-825x510.jpg)
