Yamaco: TANZO5 Forged Iron Bowl with Glass Lid

TANZO5 Forged* Iron Bowl with Glass Lid

"Hand Wash Only"

Delivery: 3-4 weeks

Refund Policy: https://japantastics.jp/policies/refund-policy

*The forging process is explained at the end.

A Masterpiece of Forged Craftsmanship

Born from the forging expertise cultivated by Yamaco since its founding in 1946, the TANZO5 Forged Iron Bowl represents the pinnacle of Japanese metalwork.

Free from impurities and forged under an extraordinary force of 2,000 tons, this bowl is built to last for generations — passed down from parent to child, and from child to the next.

The more it’s used, the more it develops character and becomes part of the family. This evolving relationship is the unique, irreplaceable charm of forged iron.

Perfected over six years, TANZO5 was created to share the beauty and strength of forging with the world.

Performance Features

01 — Even Heat Distribution & Superior Heat Retention

Designed to maximize iron’s natural thermal properties, TANZO5 cookware ensures even heat distribution and efficient cooking with minimal energy. Its exceptional heat retention keeps dishes warm and allows for effortless simmering and residual cooking — producing flavors and textures worthy of a professional chef.

02 — Cookware for a Lifetime

Made entirely of forged iron, TANZO5 is exceptionally strong and durable — unlike coated frying pans that deteriorate over time. With every use, a natural oil layer builds up, enhancing both usability and flavor. The joy of owning TANZO5 lies in nurturing it — watching it grow more familiar, more reliable, and more beautiful over the years.

Three Reasons People Keep Choosing TANZO5

Point 01 — Effortless Handling with Bowl Grip

A uniquely designed bowl handle provides a comfortable and secure grip, allowing you to lift and carry with ease. Serve dishes directly from the stove to the dining table for an elegant presentation.

Point 02 — Pure Iron, No Coatings

Forged with a rare 2,000-ton air-stamp hammer, this cookware boasts exceptional strength and resilience. It contains no artificial surface coatings, ensuring a completely natural, safe, and long-lasting cooking experience.

Point 03 — Deep-Bowl Versatility

With a deeper profile than a standard frying pan, TANZO5 accommodates a wide range of dishes — from stir-fries and stews to soups, curries, and pasta sauces. You can sauté, simmer, and mix all in one pan, while naturally absorbing beneficial iron during cooking.

Product Specifications

• Compatible with: Gas stoves / IH (Induction) / Ovens / Open flame
• Diameter: 23 cm
• Material: Iron (carbon steel)
• Color: Black
• Care: Hand wash only
• Weight: 1.6kg (bowl), 0.24kg (pull), 0.35kg (lid)
• Depth: 50 mm

*Explanation of Forging

Forging is a method of shaping metal by heating and hammering it.
It is often confused with casting, but even if the final shape looks the same, the strength and other characteristics differ greatly.
The principle is the same as what you may have seen in the work of traditional swordsmiths.

1. What is Forging?

Forging is a manufacturing process in which metal is hammered to apply pressure—hence the term “forging,” which literally means “to harden and shape.”
It is a blacksmithing technique dating back to ancient times.
Unlike casting, forging eliminates internal gaps and refines the metal structure through hammering, resulting in significantly increased strength.

Forged parts are commonly used in critical components of transportation equipment, such as drive systems and suspension parts, where high strength is essential.

A common comparison is making rice cakes (mochi).
When you pound hot rice, it becomes sticky—unlike individual grains of rice, a rice cake does not break apart even when dropped.
Similarly, because forged metal gains high toughness, it has long been used for bladed tools such as Japanese swords.

2. Advantages of Die Forging

1. Material Efficiency
   Reduces material waste.
2. Dense Metal Structure
   Prevents internal defects commonly found in cast products.
3. Improved Mechanical Properties
   Increases tensile strength and allows for thinner, lighter product design.
4. Optimized Metal Flow
   The metal grains (fibrous structure) follow the shape of the product, resulting in greater strength.
5. High Productivity
   Enables mass production of products with the same shape and consistent quality.

3. Differences Between Forged and Cast Products

Forging forms the material by hammering, while casting forms the shape simply by pouring molten metal into a mold.
There are significant differences between the two methods.

• Forging Process
  (Metal is hammered repeatedly to make the structure dense)
• Casting Process
  (Metal is simply poured into the mold, making internal voids more likely)