Get ready, kaiju fans! Japanese leather apparel brand MONSTROUSA has teamed up with the newly established "KAIJU LEATHER WORKS (KLW)" – a brand dedicated to manufacturing and selling monster-inspired leather, founded by Japan's High Socks company. Starting Fall 2026, prepare for a groundbreaking line of unique leather apparel inspired by the iconic monsters of the "Ultraman" universe!

"KAIJU LEATHER WORKS (KLW)" isn't just another brand; it's a revolutionary new material venture specializing in the research, development, manufacturing, and sale of "kaiju leather."
This dream project brings together master artisans who live and breathe kaiju culture. After two years of intensive research and development, blending leather processing techniques and materials from across the globe, they've successfully crafted a brand-new leather that's bursting with imagination and wonder. KLW aims to make people truly feel the presence of these legendary beasts, offering the unique thrill of carrying and wearing the kaiju of their dreams.

To celebrate the "Ultraman" series' 60th anniversary, KLW has developed special leather materials inspired by three classic monsters/aliens: Dada, Eleking, and Alien Mefilas. This innovative leather faithfully recreates each kaiju's distinct patterns, textures, and feel. Get ready, because this incredible "kaiju leather" will officially hit the market as a wholesale brand in Fall 2026.

But you won't have to wait that long to get your hands on some! Before the official leather launch, KLW is dropping an exclusive collaboration with Tokyo's Shimokitazawa-based apparel brand MONSTROUSA. MONSTROUSA, known for its "Ultraman" kaiju-themed art apparel, is now taking things to the next level by incorporating kaiju leather into its designs for the very first time. This partnership promises a fresh, distinctive collection that transforms the unique skin textures of monsters into everyday fashion statements, championing the bold new concept of "wearing monsters" and "integrating kaiju into your daily life."

▼ Prime Mutate Hoodie "DADA" feat. KLW Price: ¥198,000 (Made-to-order)

▼ Prime Mutate Hoodie "Eleking"/"Alien Mefilas" feat. KLW Price: ¥198,000 (Made-to-order)

▼ Shishu Prime Trainer "DADA" feat. KLW Price: ¥25,300

▼ Shishu Prime Trainer "Alien Mefilas" feat. KLW Price: ¥25,300

▼ Prime Trainer "DADA" feat. MonkeyDesign & KLW Price: ¥26,400

▼ Shishu Heavy Long-T "Eleking" feat. KLW Price: ¥18,700

To celebrate the launch of this exciting new collection and the KLW brand, a limited-time pop-up event, "ULTRA KAIJU STORAGE," will be held at Hankyu MEN'S TOKYO from August 5th to August 11th. This event is also part of the "Hankyu MEN'S × Ultraman Series Collaboration Event," a major initiative for the "Ultraman" series' 60th anniversary. Beyond showcasing the new products, visitors will get the world's first chance to touch and feel the incredible textures of kaiju leather firsthand!

POP-UP Exclusive Items
▼ Prime Handbag feat. KLW
Orders accepted on-site at the event

▼ Prime Patch JKT feat. KLW Price: ¥39,600
