Black packaging of KiQUNA Z63X premium sewing thread with light blue thread spool illustration, indicating 0.63mm thickness and 10 meters length, made in Japan.
Black and beige package of Kiwami Z63X premium fishing line, 0.63mm thick, 10 meters long, made in Japan, with a display of coiled fishing line and green accents.
Package of Keiuna Z63X premium table tennis rubber with high elasticity and control, 0.63mm thickness, made in Japan, featuring a green and black design with a graphic of a table tennis paddle.
Package of Kitezh Z63X premium bike spokes, 0.63mm thick, rated soft to hard, made in Japan. The package is black with beige text, a red spoke illustration, and green highlights.
Black packaging of Kizuna Z63X premium badminton string, highlighting high elasticity and control, with specifications, Japanese language, QR code, and green label indicating made in Japan.
Spool of high elasticity control tennis string labeled 'KITUNA Z63X' with Japanese characters, indicating high elasticity and control, 0.63mm diameter, branded 'Premium' from Japan.
Coiled light blue badminton string on a black and white circular packaging label with Japanese and English text.
Spool of Japan-branded tennis string labeled with model Z63X, green label with Japanese text, and a black background design.
Spool of KiTUNA brand badminton string with black label, green accents, and text in Japanese and English.
A round spool of yellow tennis string with black label, indicating the brand 'KITUMA', model 'Z63X', 0.63mm diameter, high elasticity and control, premium soft medium hard, made in Japan.
Spool of neon yellow badminton string in clear plastic container with black label featuring multi-colored text and graphics, labeled as KIYUNA Z63X Premium, made in Japan.
Spool of Kyoto Z63X high-elasticity and control fishing line, 0.63mm diameter, labeled as premium quality from Japan.
Sporting goods package with a circular red and clear plastic container, black label featuring Japanese text, and green highlights, containing a badminton string.

Z63X Premium

Crisp Power. Explosive Repulsion.

Crafted in Japan, Z63X is designed for players who crave a sharp, high-repulsion feel with a harder touch.

At 0.63mm, it strikes the perfect balance between explosive repulsion and solid hitting feedback, giving advanced players the confidence to drive fast-paced rallies and attack with precision.

Engineered with a high-elasticity core and a specially tuned outer layer, Z63X delivers quick shuttle release, crisp impact feel, and reliable control — making it the string of choice for aggressive, modern play.

Key Features:

  • 0.63mm gauge for high-repulsion performance

  • Crisp, harder hitting feel for attacking play

  • Quick shuttle release with stable control

  • Crafted in Japan with premium materials

  • "I really like the bounce on the string"

    Zaia Li