In Japan, food is closely connected to the changing seasons. From the first delicate shoots of spring to the rich, warming flavours of winter, the time of year has always played an important role in determining what appears on the dining table.
This relationship between food and nature is particularly important in traditional Japanese cuisine, where the quality of an ingredient is often judged not simply by where it comes from, but by when it is eaten.
The Japanese even have a word for this: shun (旬).
Shun describes the period when an ingredient is at its very best. It might be a particular fish at the height of its flavour, a vegetable at its most tender or a fruit when its sweetness and aroma are perfectly developed.
Understanding shun helps explain why seasonality is so deeply embedded in Japanese food culture, and why it remains such an important part of the sushi experience.
Eating with the seasons
Unlike the idea of a fixed menu that remains unchanged throughout the year, traditional Japanese cuisine embraces the natural rhythm of the seasons.
Spring brings ingredients such as bamboo shoots, wild mountain vegetables and fresh sea bream. Summer is associated with lighter flavours, sweetfish (ayu) and refreshing vegetables. Autumn introduces mushrooms, chestnuts and a variety of rich, flavourful fish, while winter is the season for ingredients such as yellowtail, oysters and daikon radish.
These are not simply ingredients selected because they happen to be available. They are valued because their flavour, texture and character are particularly appealing at that time of year.
For Japanese chefs, understanding these seasonal changes is an important part of their craft. It requires knowledge of ingredients, an appreciation of nature and an ability to recognise when a product is at its peak.
Why seasonality matters in sushi
Seasonality is especially fascinating when it comes to sushi.
Fish and seafood change throughout the year. Their flavour, fat content, texture and overall character can vary depending on species, water temperature, migration patterns and their stage in the natural cycle.
Take buri (Japanese yellowtail), for example. During the colder months, mature yellowtail develops a higher fat content, giving it a rich, buttery texture and a distinctive flavour. Winter yellowtail, known as kan-buri, is particularly prized in Japan.
Similarly, sanma (Pacific saury) is strongly associated with autumn. Its rich flavour and natural oils make it a seasonal favourite, traditionally enjoyed grilled as well as in other preparations.
Then there is tai (sea bream), which is particularly associated with spring. Known as sakuradai during this period, it has a special place in Japanese food culture and is often associated with the arrival of cherry blossom season.
These examples demonstrate why sushi is so much more interesting than simply selecting a favourite type of fish and eating it all year round. Experiencing the same ingredient at different times of the year can reveal entirely different characteristics.
The Japanese appreciation of imperfection and change
There is also a wider cultural appreciation of the passing seasons in Japan.
The Japanese concept of mono no aware describes an awareness of the transience of things: an appreciation of beauty precisely because it is temporary.
Cherry blossoms are perhaps the most familiar example. Their brief appearance each spring is celebrated throughout Japan, with people gathering to enjoy them while they last.
A similar appreciation can be found in Japanese cuisine. Seasonal ingredients are special partly because their moment will pass. A particular fish, vegetable or fruit might only be enjoyed at its best for a relatively short period before the next season brings something different.
Rather than seeing this as a limitation, Japanese food culture embraces it.
There is something rewarding about looking forward to an ingredient returning each year, knowing that its availability and character are tied to a particular moment in time.
Seasonality and the role of the sushi chef
For a sushi chef, working with seasonal ingredients requires more than simply knowing which fish are in season.
It involves understanding the characteristics of each ingredient and deciding how best to prepare and serve it.
Some fish benefit from being served very fresh, while others develop greater depth of flavour through careful ageing, curing or other traditional techniques. The decision depends on the species, its condition and the result the chef wants to achieve.
The same principle applies to vegetables and other ingredients. Their preparation should complement their natural qualities rather than disguise them.
This is where experience becomes particularly important. A skilled sushi chef understands that the best way to serve an ingredient is not necessarily the most complicated. Sometimes the most appropriate preparation is also the simplest.
Discovering the seasons through omakase
One of the most enjoyable ways to experience seasonality in Japanese cuisine is through omakase.
Meaning approximately 'I'll leave it up to you', omakase places the selection of dishes in the hands of the chef. Rather than choosing every course from a menu, guests entrust the chef to create an experience based on the ingredients and inspiration of the moment.
This gives the chef the freedom to introduce seasonal fish, highlight particular ingredients and create a progression of flavours that reflects the time of year.
It also means that returning to the same sushi restaurant at different times of the year can offer a completely different experience.
At Sushi Atelier, we believe that understanding the ingredients behind Japanese cuisine adds another dimension to enjoying sushi. Knowing why a particular fish is being served, what makes it special at that moment and how the chef has chosen to prepare it can make the experience all the more rewarding.
A cuisine that follows nature
Perhaps the greatest lesson from Japanese food culture is that good cooking does not always mean having access to every ingredient at every moment.
It means understanding what nature offers, recognising when something is at its best and making the most of it.
Seasonality encourages variety, creativity and a deeper appreciation of ingredients. It reminds us that food is not simply something to be consumed, but something to be experienced in the context of time and place.
And that is one of the things that makes Japanese cuisine, and sushi in particular, so endlessly fascinating.
Experience Japanese seasonality at Sushi Atelier
Discover our approach to Japanese sushi and dining at Sushi Atelier in Fitzrovia, London.
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