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05.03.2026
Natural History

Kawazu Sakura and Hot Springs in Southern Izu

Where Spring Begins Early

– Kawazu Sakura and Hot Springs in Minami-izu –

Kawazu Sakura trees in bloom along the Aono River 
Minami-izu, Southern Izu Peninsula
Kawazu Sakura trees in bloom along the Aono River 
Minami-izu, Southern Izu Peninsula

Report by Masahiko Kaji

Spring in Japan is widely associated with cherry blossoms that bloom in late March.
But in the warm valleys of the Izu Peninsula, spring arrives much earlier.I recently visited Minami-izu, located at the southern tip of the peninsula, to see the famous Kawazu Sakura, an early-blooming variety of cherry blossom.

Steam rising from Shimogamo Onsen drifts 
through the cherry blossom landscape.
Steam rising from Shimogamo Onsen drifts 
through the cherry blossom landscape.

The Izu Peninsula is recognized as part of the UNESCO Global Geoparks Network, a region shaped by volcanic activity that created dramatic coastlines, abundant hot springs, and fertile river valleys.

Along the Aono River in Minami-izu, about 800 Kawazu Sakura trees line both sides of the river for nearly two kilometers, forming a continuous corridor of soft pink blossoms.

The trees here are large and full-shaped, creating an especially impressive landscape.One of the most memorable sights is the contrast between the blossoms and the steam rising from the nearby Shimogamo Onsen hot springs.
White steam drifts through the riverside air, while the pink blossoms spread across the sky above the river.

Nearly 800 cherry trees form a two-kilometer
corridor of blossoms along the riverbanks.
Nearly 800 cherry trees form a two-kilometer
corridor of blossoms along the riverbanks.

A Cherry Blossom That Blooms Ahead of Spring

Kawazu-zakura (Cerasus × kanzakura ‘Kawazu-zakura’) is a cherry tree variety native to Japan.

While Japan’s most famous cherry blossom, Somei Yoshino, typically blooms in late March in Tokyo, Kawazu Sakura begins flowering in mid-February.

Another distinctive feature is its long blooming season.
Unlike many cherry blossoms that fall within a week or two, Kawazu Sakura can remain in bloom for nearly a month.

Japan is said to have around 600 varieties of cherry trees, each with its own seasonal rhythm.

Kawazu Sakura is cherished because it signals the very beginning of spring in Japan.

A Moment of Life Beneath the Blossoms

While walking along the river, I noticed a newly married couple taking commemorative photographs beneath the blossoms.

Scenes like this are common during Japan’s cherry blossom season.

For many people in Japan, cherry blossoms are not only a natural spectacle, but also a moment to celebrate life—gathering with family and friends, welcoming the arrival of spring, and marking milestones.

In Minami-izu, where the blossoms appear earlier than anywhere else, that celebration begins quietly in February.

Newlyweds taking commemorative photographs
beneath the early spring blossoms.
Newlyweds taking commemorative photographs
beneath the early spring blossoms.
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