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Kakitsubata - Iris Laevigata

Japanese iris

Iris laevigata, family Iridaceae

In its own language: カキツバタ

A water-loving Japanese iris with violet-blue blooms and historic garden ties

Photo: Dennis L. Lindwall, CC BY-SA 3.0, via Wikimedia Commons

Iris laevigata is a flowering plant native to Japan, often found in shallow ponds or marshy ground. Its flowers range from blue to purple or violet, sometimes with white markings, and it has been grown in Japanese gardens for centuries.

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  • Blooms in late April to May in Japan
  • Featured in a Heian-period poem using its name’s syllables
  • Emblem of both Aichi Prefecture and Chiryū City
  • Grows naturally in shallow water or wet soil
  • Depicted on National Treasure screens by Ogata Korin

What does Japanese iris look like?

This iris grows upright with slender leaves and showy flowers that open in spring. Blooms are typically violet, purple or blue, but some forms carry white petals marked with blue spots, or deep purple edged in white. It thrives in wet conditions, often rooted in shallow water.

Where does Japanese iris come from?

Iris laevigata is native to Japan, though it also occurs in parts of China. It belongs to the Limniris subgenus of irises and has been part of Japanese horticulture since at least the Heian period, with named varieties recorded by the late 1600s.

When and how Japanese iris blooms

It grows best in still, shallow water or very moist soil. Seeds may take weeks to over a year to sprout, even under ideal conditions. Some types bloom repeatedly in mild climates, making them suitable for temperate water gardens.

How Japanese iris is used

In Japan, it appears in temple gardens and public displays. The city of Chiryū and Aichi Prefecture both claim it as their emblem. Each spring, a festival at Muryojuji Temple draws large crowds to see its bloom.

Kinds of Japanese iris

Notable forms include 'washino-o', with white flowers and blue spots, and 'maikujaku', which has dark purple petals edged in white. The leaf-variegated 'Variegata' is recognised for garden performance in the UK.

What Japanese iris means

The plant inspired a famous poem in the Ise Monogatari, using the syllables ka-ki-tsu-ba-ta. Ogata Korin’s National Treasure screens at the Nezu Museum depict it, and they are shown each year when the irises bloom in the museum’s pond.

Where Japanese iris is used and seen

The Daffodil FestivalPierce County’s spring parade and daffodil celebration since 1934GosekkuFive seasonal festivals once held at the Japanese imperial courtHakone Botanical Garden of WetlandsA garden of wetland and alpine plants in Hakone, JapanParc floral de ParisA botanical garden and flower park in the Bois de Vincennes, ParisParc Floral de la SourceA large public garden in Orléans built around the source of the Loiret riverKeukenhofA vast Dutch flower garden famous for its spring tulip displaysKanzashiTraditional Japanese hair ornaments, often crafted as folded silk flowersBouquetA creative arrangement of flowers, given or displayed for many occasions

Traditions that use it

Ikenobo, the oldest ikebana school

Where to see Japanese iris

🇯🇵 Kanazawa · All yearKenroku-enOne of Japan's most celebrated landscape gardens, with something in flower in almost every season. 🇯🇵 Kyoto · All yearAn ikebana lesson in KyotoLearn the basics of Japanese flower arranging in the city where the art took shape.

Questions people ask about Japanese iris

Where does Iris laevigata come from?

It is native to Japan, and also found in parts of China. It grows wild in shallow water or marshy areas.

When does the Japanese iris bloom?

In Japan, it flowers in late April and May. The Nezu Museum displays its famous iris screens during this time.

What is special about kakitsubata in Japanese culture?

It appears in classical poetry and art. A Heian-era poem uses its name’s syllables, and Ogata Korin painted it on National Treasure screens.

Is it used as a symbol anywhere?

Yes. It is the official flower of Aichi Prefecture and Chiryū City in Japan, where an annual festival celebrates its bloom.

How is it grown?

It prefers shallow water or very damp soil. Some varieties can bloom repeatedly in mild climates, and seeds may take months to germinate.

Good reading and sources

Where this page comes from

The facts on this page come from the Wikipedia article "Iris laevigata", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). Phool rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.

It may contain mistakes. It is not medical or foraging advice: many flowers are poisonous, and traditional uses are reported, not recommended. If something is wrong, tell us. Last refreshed 2026-10-03.

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Photo credits on this page

The small pictures above come from Wikimedia Commons under free licences. Some are cropped to fit.

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