Himitsu Bako 4 – 90-Step Extreme Mechanical Puzzle Box (Japanese Secret Box)

Himitsu Bako 4 is an extreme mechanical puzzle box featuring a 90-step solution hidden inside a compact Japanese-style secret box.
Designed for expert solvers, this puzzle challenges logic, patience, and spatial thinking with four internal blind mazes.

Following the traditions of classic Japanese puzzle boxes, Himitsu Bako 4 relies on a sophisticated system of hidden sliding panels that must be guided through four blind internal mazes. Every move matters. One mistake can send you back several steps, forcing you to rethink your entire strategy.

Despite its relatively small size, this puzzle is an absolute beast. The exterior features intricate maze-like patterns that not only hint at the complexity inside but also make the box visually striking — even when produced in a single color. It’s a puzzle that looks just as good on display as it feels to solve.

This is a puzzle box made for true puzzle connoisseurs — those who enjoy long, methodical solves and appreciate clever internal engineering over quick wins.

Details

• Designer: Jeroen Kruit
  Brand: 2222pzzls

• Size: 58 × 76 × 118 mm

• Compartment size: 37 × 57 × 119 mm

• Difficulty: Hard

• Goal: Open the box

Perfect for collectors, advanced solvers, or anyone looking for a puzzle box that truly earns its reputation.