Bamboo for the Shakuhachi

A bamboo flute can be described by its plant material, its length and the treatment of its inner wall. Reading those descriptions separately makes the language of the shakuhachi easier to understand.

Madake, the Shakuhachi's Bamboo

The World Shakuhachi Festival's introduction to the instrument identifies its traditional material as thick-walled madake bamboo, Phyllostachys bambusoides. The botanical name is useful because "bamboo" alone is a broad description. When reading about an instrument or a study of flowering, begin by checking which bamboo is actually being discussed.

The shakuhachi has four finger holes at the front and one at the back, giving a pentatonic, or five-tone, scale. That simple arrangement does not confine it to five notes. The meri-kari system combines partial hole closing, head movements and subtle changes in embouchure, the way the mouth shapes the blowing position. The festival overview describes a twelve-tone chromatic scale extending up to three octaves.

For listening, the distinction is helpful: a description of the holes tells only part of the story. The player's movements also shape pitch and tone colour. Rather than counting holes as a measure of musical possibility, listen for how a note changes within a phrase. That is a useful starting point for hearing the instrument's range of expression.

What the Length Means

The name shakuhachi refers to the standard length: one shaku and eight sun, expressed as 1.8 Japanese feet or 54.5 centimetres. The festival overview associates that length with D and lists 1.6, 1.8, 2.0, 2.4, 3.0 and 3.4 among the most commonly played lengths. The name therefore points to a particular measure even though instruments of other lengths are also called shakuhachi.

Keep the length label separate from a description of the bore. "1.8" answers a question about size; "jinashi" answers a question about the inner wall. Reading both gives a clearer description than treating either term as the complete identity of the instrument. The flute keys and sizes reference brings the size labels together for comparison.

Jiari and Jinashi

The festival overview distinguishes two broad varieties. Jiari flutes have paste or lacquer applied to the inside wall. Jinashi flutes largely leave the natural inner lining of the bamboo. Jinashi is the natural-bore style discussed alongside the ginashikan models on the flute descriptions page.

The word "largely" matters: natural bore is a description of the interior, rather than a claim that every part of an instrument is untouched. These terms give a way to ask what has been retained and what has been applied inside the bamboo. They do not, by themselves, settle which sound a listener will prefer. Treat them as a vocabulary for understanding the material, then return to the music.

When Bamboo Flowers

Recent flowering papers concern henon bamboo, Phyllostachys nigra var. henonis, a different bamboo from madake. A 2023 PLoS One study describes it as monocarpic, with a 120-year flowering interval, and follows a localized flowering site in Japan encountered in 2020.

Over three years, more than 80% of the culms, or bamboo stems, at that site bloomed. No seeds were produced and no established seedlings were found. Some stems appeared after flowering but died within a year; most of the small, weak stems also died within a year. By the end of the three-year observation, all culms had died and the researchers detected no sign of regeneration.

The authors acknowledged a puzzle: difficult regeneration at this site had to be considered alongside the bamboo's long persistence in Japan. Their observations describe what happened within the study period, rather than resolving every question about how the species persists. A 2024 Mycoscience paper likewise reported henon flowering in Japan in the 2020s and estimated that it was the first recorded flowering in 120 years.

Neither finding establishes a change in madake supply. Species, location and observation period belong beside the result whenever it is discussed. Keeping those details together lets the flowering research remain an account of henon biology, without turning it into a forecast about flute materials.

Choosing with the Material in Mind

When comparing the site's models, read the material, length and bore description as separate pieces of information. A practical note might record each of those details, then leave room for listening impressions. This keeps botanical questions, construction terms and musical preferences in their own place, while allowing them to inform a thoughtful understanding of the instrument.