How to Make Viral Wagyu Katsu Sando (Dekasan Osaka Copycat Recipe)

Dekasan, located in Osaka, Japan, is known for its massive and indulgent Japanese sandwiches, especially its famous steak sando. The shop specializes in thick-cut, tender beef, often wagyu or harami, served rare and packed between shokupan (Japanese milk bread). What makes it stand out is its oversized portions, sometimes using up to 400g of meat. The shop itself is small with limited seating, which often leads to long wait times.

That’s exactly why this recipe is worth making at home... You can recreate the same rich, satisfying sandwich without the wait!

Why You’ll Love This Recipe

This copycat Dekasan Wagyu Katsu Sando recreates the rich, indulgent experience at home using high-heat searing to achieve a perfectly rare, juicy steak inside fluffy shokupan. It is quick, easy, and ready in just 20 minutes with minimal ingredients.

Key Ingredients

Wagyu or Harami Steak: Thick-cut steak provides a tender, juicy center and a bold, beefy flavor.

Shokupan: Soft, slightly sweet bread complements the savory steak and creates the iconic katsu sando texture.

Seasoning: Simple salt, pepper, or sansho enhances the steak without overpowering it.

Optional Additions: Mustard adds brightness, capers introduce a tangy contrast, and extra cracked pepper gives mild heat and depth.

Helpful Tools

• Heavy Skillet– Essential for high-heat searing of the steak to achieve a rare, juicy center.
• Sharp Steak Knife – Needed to cut thick steak blocks cleanly and slice the sandwich neatly.
• Bread Loaf Molder – Optional but recommended for baking soft, fluffy shokupan at home. 

Preparation & Cooking Tips

• Slice Steak Against the Grain: Cutting the steak against the grain ensures maximum tenderness and a melt-in-your-mouth texture.
• Keep Steak Blocks Thick: Aim for 3–4 cm thick blocks to achieve the rare, juicy center that is the hallmark of Dekasan-style katsu sandos.
• Toast the Bread Lightly: Lightly toasting the shokupan adds subtle crispness while keeping the bread soft and pillowy.
• Rest the Steak in Foil: After searing, loosely wrap the steak in foil to lock in juices and maintain optimal tenderness.
• Butter & Garlic Finish: Quickly coat the rested steak in melted butter and garlic for rich flavor without overcooking the meat.

Serving Suggestions & Storage Tips

Serve the wagyu katsu sando with shredded cabbage, crispy fries, or alongside other Japanese sandwiches like egg sando.

Wrap the sandwich in wax paper to maintain shape and make slicing clean and easy. Best enjoyed immediately, but leftover sandwiches can be stored in an airtight container in the refrigerator for up to 1 day. Reheat gently to preserve the rare steak texture and fluffy bread.

Like this recipe? You might also like:

• Tamago Sando – Classic Japanese egg sandwich with creamy filling and soft bread.
• Katsu Sando – Classic Japanese steak sandwich.
• Salmon Katsu Sando – Crispy fried salmon cutlet served between fluffy milk bread.
• Famichiki Copycat Recipe – Homemade version of the popular Japanese fried chicken from FamilyMart