Japanese-Style Tuna Sandwich

This Japanese Tuna Sandwich (ツナサンド, Tuna Sando) is a simple yet delicious sandwich featuring a creamy, umami-rich tuna salad made with Japanese mayo, served between soft, fluffy shokupan (Japanese milk bread). Light, slightly sweet, and incredibly satisfying, this sandwich is a favorite in Japanese cafés and convenience stores.

Why You’ll Love This Recipe

• Light and creamy – Made with Japanese Kewpie mayo for a rich yet delicate flavor.
• Soft and fluffy bread – Uses shokupan (Japanese milk bread) for the perfect texture.
• Quick and easy – Ready in just 10 minutes.
• Great for snacks or lunch – A staple in Japanese cafés and konbini (convenience stores).
• Balanced flavors – A subtle blend of umami, tanginess, and slight sweetness.

Ingredients

(Tip: You can find the complete list of ingredients and their measurements in the recipe card below.)

For the Tuna Filling

• 1 (5 oz) can tuna, drained (preferably oil-packed for richer flavor)
• 2 tbsp Kewpie mayonnaise (Japanese mayo)
• 1 tsp soy sauce (or tamari for gluten-free)
• ½ tsp Dijon mustard (optional, for depth)
• ½ tsp sugar (optional, for a mild sweetness)
• ¼ tsp salt (adjust to taste)
• ¼ tsp black pepper
• ½ tsp lemon juice (optional, for freshness)

For the Sandwich

• 4 slices shokupan (Japanese milk bread) or white sandwich bread
• 1 tbsp butter (optional, for extra richness)
• 2 lettuce leaves (optional, for crunch)

Directions

1. Prepare the Tuna Salad

• In a bowl, mix together tuna, Kewpie mayo, soy sauce, Dijon mustard, sugar, salt, black pepper, and lemon juice until smooth and creamy.

2. Assemble the Sandwich

• Lightly butter one side of each slice of shokupan (optional, but adds flavor).
• Spread an even layer of the tuna mixture onto one slice of bread.
• Add lettuce leaves if using, then top with another slice of bread.
• Gently press the sandwich together.

3. Trim and Cut

• For a konbini-style sandwich, trim off the crusts using a sharp knife.
• Cut the sandwich diagonally into two triangles or into thirds for a classic Japanese sandwich shape.

4. Serve and Enjoy

• Serve immediately or wrap in plastic wrap and refrigerate for 30 minutes for the flavors to meld.

Servings and Timing

• Servings: 2 sandwiches
• Prep Time: 5 minutes
• Total Time: 10 minutes

Variations

• Spicy Tuna Sandwich – Add ½ tsp Sriracha or wasabi for heat.
• Egg & Tuna Mix – Mix in 1 chopped boiled egg for extra creaminess.
• Cucumber Crunch – Add thinly sliced cucumbers for a refreshing bite.
• Wasabi Mayo Twist – Mix ½ tsp wasabi paste into the mayo for a bold kick.
• Cheesy Tuna Melt – Add a slice of cheese and toast the sandwich.

Storage/Reheating

• Refrigeration: Store in an airtight container or wrapped in plastic wrap for up to 24 hours.
• Freezing: Not recommended, as the bread may become soggy.
• Reheating: Best enjoyed cold, but can be lightly toasted if preferred.

FAQs

What is the difference between Kewpie mayo and regular mayo?

Kewpie mayonnaise is made with egg yolks instead of whole eggs, giving it a richer, umami-packed flavor with a smoother texture.

Can I use regular white bread instead of shokupan?

Yes, but shokupan’s soft, slightly sweet texture makes it ideal for this sandwich.

Is this sandwich served warm or cold?

It is typically served cold, but you can toast it for a warm variation.

Can I make this sandwich ahead of time?

Yes! Wrap it tightly and refrigerate for up to 24 hours for a classic konbini-style sandwich.

How can I make this sandwich healthier?

Use whole wheat bread, reduce the mayonnaise, and add extra veggies like cucumber or avocado.

What other toppings go well with this sandwich?

Sliced avocado, thin cucumber slices, or shredded cabbage add extra texture and flavor.

Can I make this sandwich with fresh tuna?

Yes! Use grilled or poached tuna, then flake and mix with the other ingredients.

What pairs well with a Japanese tuna sandwich?

A side of miso soup, a light salad, or Japanese pickles pairs perfectly with this sandwich.

How do I keep the sandwich from getting soggy?

Drain the tuna well and lightly butter the bread to create a moisture barrier.

Can I add a fried egg for extra richness?

Yes! A soft tamago (Japanese omelet) or fried egg makes this sandwich even better.

Conclusion

The Japanese Tuna Sandwich (ツナサンド) is a light, creamy, and delicious sandwich that’s incredibly easy to make. Whether you’re looking for a quick lunch, a satisfying snack, or a nostalgic konbini-style treat, this Japanese-style tuna sandwich is a must-try. Enjoy it with your favorite sides for a taste of Japan at home!