Rare Iwatsu Rainbow Art Glass Vase | Osaka, Japan | c1965

A breathtaking synthesis of Japanese craftsmanship and Mid-Century Modern exuberance, this Iwatsu Glass vase is a premier example of the Hineri (twisted) technique.

Produced in Osaka during the movement’s 1960s–70s zenith, this particular vessel features the elusive "Rainbow" colorway, a sophisticated, multi-tonal fusion of cerulean blue, madder pink, and citron yellow.

The artistry lies in the suspension of pigment; as the glass is hand-manipulated, the colors bleed and overlap, creating an ethereal spectrum of violet and amber that shifts dynamically with the light.

Unlike pieces destined for export that are marked Hineri Glass, this incredible vase was distributed by Kamei Glass and retains its original "IW Art Glass" label, identifying it as a rare market find originally sold within Japan.

Artisanal Heritage:

Hand-blown by Iwatsu Glass Co. Ltd, Japan’s foremost mid-century glasshouse, often compared to the masters of Murano and Chřibská for its quality and weight. 

The 'Rainbow' Palette:

This tri-color application is the most coveted among serious collectors, valued for its complexity and scarcity.

Sculptural Form:

A substantial, lobed body anchored by a heavy, light-refracting clear glass base, a hallmark of the "Slow Furniture" movement’s commitment to enduring quality.

Provenance:

Sourced and curated for its exceptional character, representing a distinct departure from mass-produced décor.

Dimensions & Condition

Height: 24 cm 

Diameter: 10 cm 

Condition:

Very good vintage condition. The glass retains a high-gloss luster with minimal surface wear. A singular internal cooling mark at the base is an authentic vestige of the 1960s manufacturing process, serves as a testament to its handmade origin.