How do you build the perfect bento box?

Use the traditional Japanese 4:3:2:1 ratio: four parts rice, three parts protein, two parts vegetables and one part pickle or treat. Start with steamed rice, add a protein such as chicken katsu, pile in colourful vegetables, then finish with a pickle and a small treat.

What is the 4:3:2:1 bento ratio?

The 4:3:2:1 ratio is a traditional Japanese guideline for a balanced bento. It means four parts rice (carbohydrate), three parts protein, two parts vegetables and one part pickle, fruit or treat. This balance gives energy, strength and goodness in one box.

What goes in a Tanakatsu bento?

A Tanakatsu bento is built on simplicity, honesty and quality. It pairs steamed white rice with a crispy katsu protein such as chicken, pork or prawn, or teriyaki chicken, grilled fish or a vegetarian pumpkin croquette, plus fresh cabbage salad, colourful vegetables and fukujin-zuke pickles.

How do you keep a bento box fresh and safe?

Cool every item to room temperature before sealing the box, keep wet and dry foods separate to avoid sogginess, and store the bento in the fridge until lunchtime. These habits keep the meal tasty and safe, especially in warm weather.

Where can I get a bento box in London?

Tanakatsu is a Japanese katsu restaurant in Angel, Islington, London, offering katsu sets, sushi and bento boxes made with family recipes and a focus on simplicity, honesty and quality.

Bento Box London: Build It Perfectly

Build the perfect bento box London style. Master the 4:3:2:1 ratio for a balanced lunch, the Tanakatsu way. Try ours in Angel today.

Market analysts value the global bento box market at around USD 1.5 billion in 2024, and they expect it to grow by roughly 7-8% every year. So how do you build the perfect bento at home? Follow one simple rule. Japanese cooks use the classic 4:3:2:1 ratio. That means four parts rice, three parts protein, two parts vegetables and one part pickle or treat. Get that balance right, and you win every time. Below, we share the Tanakatsu way, step by step.

What makes a bento box perfect?

Bento Box London A perfect bento looks beautiful and tastes balanced. First, it fills you up without weighing you down. Next, it mixes colours, textures and flavours in one neat box. Above all, it follows the 4:3:2:1 ratio. This traditional Japanese guideline keeps every meal in proportion. Therefore, you get carbs for energy, protein for strength and veg for goodness. Pickles then add a sharp, fresh finish. In short, balance does all the hard work for you.

The Tanakatsu way: simplicity, honesty and quality

At Tanakatsu, we live by three words. We believe in simplicity, honesty and quality. Our founders, Koko and Joe, brought family katsu recipes from Japan to Angel, London. As a result, every box celebrates proper Japanese comfort food. We keep things simple, yet we never cut corners. So a Tanakatsu bento always feels honest, fresh and generous.

Build your bento box, step by step

Start with the rice

Rice forms the base of every great bento. So spoon in fluffy, steamed white rice first. Then pack it gently into one side of the box. Brown rice works well too, if you prefer extra fibre. Either way, let the rice cool before you close the lid.

Add a star protein

Next, choose your hero. At Tanakatsu, crispy chicken katsu steals the show. Pork katsu and prawn katsu also shine. Alternatively, pick teriyaki chicken or grilled fish for a lighter lunch. Vegetarians can enjoy our golden pumpkin croquette instead. Slice the protein neatly, because tidy pieces always look far more tempting.

Pile in the vegetables

Now add colour and crunch. A handful of crisp cabbage salad brings a fresh, clean bite. Edamame, broccoli and carrots add bright colour and goodness. Just remember the rainbow rule. The more colours you add, the more nutrients you get. Therefore, aim for at least two or three different veg.

Finish with pickles and a little treat

Finally, add a small pickle and a tiny treat. We love fukujin-zuke pickles for their sweet, sharp crunch. A slice of seasonal fruit then rounds things off nicely. This last touch fills the “1” in the 4:3:2:1 rule. As a bonus, it makes the whole box look complete.

Keep your bento fresh and safe

Food safety matters, especially in warm weather. So cool every item to room temperature before you close the lid. Also, keep wet and dry foods apart to stop any sogginess. Then store your bento in the fridge until lunchtime. These simple habits keep your meal both tasty and safe.

Why bento works so well

Bento Box London Bento makes healthy eating easy. The neat compartments control your portions for you. Because of this, many busy workers and students now pack one daily. Furthermore, a typical 600ml box holds around 600 calories when you fill it well. That gentle balance explains why bento keeps winning fans around the world.

Taste the Tanakatsu bento for yourself

Building a bento at home is fun and rewarding. Sometimes, though, you simply want the real thing. So pop into Tanakatsu in Angel, London. Try our katsu sets, fresh sushi and beautiful bento boxes. Come hungry, and you will leave happy – the Tanakatsu way.