JB50 Ai Indigo Sorahikohime Nou (Up to 36 inches) - 45R by 45rpm studio

UNISEX

Jeans/Sorahikohime

JB50 Ai Indigo Sorahikohime Nou

Name: JB50 Ai Indigo Sorahikohime Nou (32 in)
Brand: 45R
SKU: 609603337806
Availability: InStock

$30,300.00 TWD

・Dyed with a blend of natural Ai Indigo and indigo
・Straight cut
・Special Ai-dyed sashiko patch
・45R's signature cut

"JB" stands for Japan Blue, a tribute to the art of indigo. The yarn in these jeans is hand-dyed using an even balance of indigo and natural Ai, each comprising fifty percent. This rare dye comes from a precious batch of deadstock JB50, preserved for over two decades and now reintroduced for this release.

These unisex straight-cut Sorahikohime jeans feature a steady rise and a clean fit at the hips. The layered tones of Ai and indigo, deeply absorbed into the yarn through skein dyeing, are designed to merge and shift with wear, forming a rich and evolving depth of color. Woven on power looms, the fabric carries selvedge on a single edge—a rare detail that underscores its exclusivity. Each pair stands as a singular expression of craftsmanship, shaped by time and impossible to reproduce in exactly the same way again.

Model Information

MODEL HEIGHT 165cm (5'5")

WEARING SIZE 04 - 30 in

MODEL HEIGHT 173cm (5'8")

WEARING SIZE 08 - 34 in

MODEL HEIGHT 173cm (5'8")

WEARING SIZE 08 - 34 in

Size Chart

IN CENTIMETER

SIZE	WAIST	HIPS	FRONT RISE	INSEAM	THIGH WIDTH	HEM WIDTH
01 - 27 in	72	100	27	74	28	20
02 - 28 in	74	102	27	74	29	20
03 - 29 in	74	106	28	75	30	21
04 - 30 in	78	108	28	75	31	22
05 - 31 in	80	110	29	75	31	22
06 - 32 in	84	110	29	75	31	22
07 - 33 in	84	112	29	75	31	22
08 - 34 in	88	114	30	76	32	22
09 - 36 in	92	120	31	76	35	23

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A Journey with Ai Denim

In September 2000, on the day we opened our New York store, we introduced Made-in-Japan denim dyed with natural Ai. For us, natural indigo does not begin in the dye vat. It begins in the fields—seeds planted in spring, leaves harvested in summer, then steamed, dried, and fermented into sukumo. In Tokushima, this process alone can take close to a year. Only after the indigo is carefully cultivated and the dye vat is built does the dyeing begin. The yarn is dipped and aired 20 to 30 times, oxidizing again and again, not simply coloring the thread but allowing the blue to grow. What drew us in was not just the color, but the layers of time held within it.

Story of 藍

While searching for a new possibility in denim, we encountered a rare workshop in Tokushima that carries out both indigo dyeing and weaving under one roof. Dyeing and weaving are usually separate crafts, yet here, naturally dyed yarn could be woven on a Japanese shuttle loom capable of producing true selvedge denim. Because indigo is alive, it changes with the day—sometimes vigorous, sometimes resting. Watching its condition, the artisans dye the yarn over two to three weeks until the color penetrates to the core. Around 2,200 warp threads are then aligned by hand and woven on a 1950s shuttle loom that produces only 30 meters a day. The clean white selvedge and the textured irregularity are marks of this loom, and even after repeated washing, the denim does not fade to white but deepens into a misty, purplish Japan Blue.

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JB50 Ai Indigo Sorahikohime Nou

A Journey with Ai Denim

Story of 藍

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