Lemon

The Appeal of Lemons and the Joy of Fruit Picking

When you think of lemons, imported varieties may be the first to come to mind, but Japan actually has wonderful lemon-growing regions of its own. Domestic lemons, cultivated primarily in the warm coastal areas around the Seto Inland Sea, are often grown without anti-fungal agents or wax, making it safe to use the peel as well -- a major advantage. The fresh acidity of the juice and the refreshing aroma rising from the peel are so superior that it is no exaggeration to say they are an entirely different fruit from imported lemons.

Lemon picking is a relatively new fruit picking experience, centered around the islands of the Seto Inland Sea. Harvesting sun-ripened lemons straight from the tree under blue skies and warm weather is a luxury that is uniquely "Setouchi." The sight of picking vibrant lemon-yellow fruit in a field swept by ocean breezes is also incredibly photogenic.

The beauty of lemon picking is that you can make full use of every part of the freshly harvested lemons. Since you can use not just the juice but the entire peel as well, the possibilities are endless -- lemonade, lemon curd, candied lemon peel, lemon salt, and more.

Peak Season and Regional Differences

Domestic lemons can be harvested throughout the year, with different ways to enjoy them depending on the season.

Seasonal Characteristics

The peak season for domestic lemons runs from winter through spring (January to April), when yellow lemons have the most juice and the best balance of acidity and aroma. Autumn green lemons have a distinctive, sharp and youthful fragrance that makes them ideal as a culinary accent. Lemon picking is generally offered from October through around May of the following year, with the peak period running from November to March.

Characteristics by Major Growing Region

Hiroshima Prefecture -- Japan's top domestic lemon producer, accounting for over 50% of the national output. The town of Setoda in Onomichi City (Ikuchi Island) is nationally famous as "Lemon Island," with Ikuchi Island alone producing about 30% of all domestic lemons. The islands along the Shimanami Kaido enjoy year-round warmth and low rainfall, creating an environment close to a Mediterranean climate that is ideal for lemon cultivation. Lemon farming in Hiroshima Prefecture began in 1898 (Meiji 31) and has a history spanning over 120 years.

Ehime Prefecture -- The second-largest lemon producer in Japan. Community-wide initiatives like the "Blue Lemon Island" project on Iwagi Island are promoting lemon cultivation across the region. The warm Seto Inland Sea climate and well-drained terraced hillside fields are well-suited for growing lemons.

Wakayama Prefecture -- The third-largest producing region, with lemon cultivation centered in the Arida area. Their lemon farming draws on the expertise developed through the area's established mikan cultivation techniques.

Variety Guide -- Flavor and Characteristics

Lisbon

The most widely cultivated lemon variety in the world, and one of the leading varieties in Japan as well. The fruit is medium-sized at about 100-130g, with abundant juice and strong acidity. The skin is somewhat thick with a rough surface, and the fruit is widely used in cooking and drinks thanks to its ease of juicing and excellent aroma. It is somewhat sensitive to cold, so it is primarily cultivated along the warm Seto Inland Sea coast.

Eureka

One of the two classic lemon varieties alongside Lisbon. The fruit is slightly smaller than Lisbon with smoother skin. It is notable for having few seeds and abundant juice, making it a practical variety for cooking. The trees are compact with fewer thorns, which also makes them easier to harvest during lemon picking.

Meyer Lemon

Believed to be a natural hybrid of lemon and orange, this variety has a rounder shape than regular lemons. The skin is a deep yellow with an orange tint, and its most distinctive feature is its mild acidity. The sugar content is high enough that it can even be eaten as-is. It is mainly cultivated in the town of Mihama in Mie Prefecture and is known as "Maeda's Meyer Lemon." This variety is recommended for those who find ordinary lemon acidity too strong.

Rinoka

A Japanese-bred variety developed by the National Agriculture and Food Research Organization (NARO), registered in 2015. The fruit is exceptionally large at 180-200g, about 1.5 times the size of a typical lemon. It has mild acidity and abundant juice, and it is also resistant to citrus canker, a common disease in citrus fruits. This makes it a promising variety for reduced-pesticide cultivation.

How to Identify Delicious Lemons

Here are some tips for selecting delicious lemons during lemon picking or at the store.

Skin color and firmness -- For yellow lemons, choose ones with a vivid lemon-yellow color and skin that feels firm and springy. Dull-colored or wilted-looking lemons are past their prime. For green lemons, look for ones with a deep green color and a glossy surface.

Stem condition -- A green, fresh-looking stem is a sign of freshness. If the stem has turned brown and withered, the lemon may have been harvested some time ago.

Weight -- For lemons of the same size, choose the heavier one. Lemons that feel noticeably heavy are full of juice, giving you plenty to squeeze for cooking and drinks.

Shape -- Look for an oval, rugby ball-like shape that is symmetrical. Extremely irregular shapes may indicate uneven development. That said, domestic lemons tend to vary more in shape compared to imported ones, and slight irregularity has no effect on flavor.

Tips to Enjoy Lemon Picking 10 Times More

1. Enjoy the Setouchi scenery too

One of the great pleasures of lemon picking is that it comes with stunning views of the Seto Inland Sea. Consider building a trip that combines lemon picking with cycling along the Shimanami Kaido or island-hopping by ferry. The view of the Seto Inland Sea from a lemon orchard is breathtakingly beautiful.

2. Experience the difference between green and yellow

Some farms offer both green and yellow lemons depending on the season. Try comparing the sharp acidity and crisp fragrance of green lemons with the mellower acidity and richer aroma of yellow lemons to experience the contrast for yourself.

3. Plan recipes that use the whole peel

The biggest advantage of domestic lemons is that the peel is safe to eat. Lemon peel is rich in aromatic compounds like limonene and citral. Planning peel-inclusive recipes before heading to the farm -- such as grating lemon zest over pasta or thinly slicing lemons for honey-lemon -- adds to the anticipation and excitement.

4. Harvest carefully with scissors

Some lemon trees have thorny branches, so be careful. Use the scissors provided by the farm to cut just above the fruit. Pulling the fruit off by hand can damage the branch, so always use scissors.

5. Savor the lemon aroma

Freshly harvested lemons release a vivid, intense aroma when you gently rub the skin. This fragrance is a freshness you can only experience at the farm. Take a deep breath and enjoy the lemon aroma to the fullest.

Nutrition and Health Benefits

Lemons are famous as the "poster fruit for vitamin C," but they also contain a variety of other nutrients and offer numerous health benefits.

Vitamin C

Lemon juice contains about 50mg of vitamin C per 100ml. Vitamin C is a powerful antioxidant that plays a role in maintaining immune function, promoting collagen production, and enhancing iron absorption. It also helps suppress melanin pigment production, making it a beneficial nutrient for skin brightening and skin health. Note that the industry-standard "one lemon's worth of vitamin C" is defined as 20mg, which corresponds to about 40ml of lemon juice.

Citric Acid

Citric acid is the main component responsible for the sour taste of lemons. Lemons contain about 6 times the citric acid found in mikan and about 300 times that found in apples, giving them one of the highest citric acid levels among all citrus fruits. Citric acid activates the body's energy metabolism and promotes recovery from fatigue. It also has a "chelation effect" that helps the body absorb calcium and iron.

Limonene

An essential oil compound found abundantly in lemon peel. It is the source of the refreshing aroma and is associated with relaxation effects and improved concentration. Limonene also promotes blood circulation and is considered effective for improving sensitivity to cold.

Eriocitrin

A polyphenol unique to lemons with strong antioxidant properties. It is found in high concentrations in the lemon peel and the white pith (albedo), and research suggests it may contribute to liver health. By using domestic lemons whole, peel and all, you can efficiently take in this beneficial compound.

Rutin

A type of flavonoid that strengthens blood vessels and helps prevent arteriosclerosis. It also aids in the absorption of vitamin C, creating a synergistic effect with the vitamin C naturally present in lemons.

Storage Methods and Take-Home Tips

Room Temperature Storage

Lemons can be stored at room temperature for about 1-2 weeks in a cool location. Keep them out of direct sunlight in a well-ventilated area. Refrigerator storage is recommended during the summer months.

Refrigerator Storage

Refrigeration is the standard way to keep lemons fresh for a longer period. Wrap each lemon individually in plastic wrap, or place them in a plastic bag and store them in the vegetable crisper drawer of your refrigerator, where they will maintain their quality for about 1 month. The key is preventing dehydration -- wrapping them tightly in plastic prevents the juice from evaporating.

Freezer Storage

Lemons can even be frozen whole. Grating a frozen lemon gives you a fresh lemon powder that includes both the peel and flesh. Freezing lemon slices makes them convenient to use as iced lemon garnishes for drinks. Squeezing the juice and freezing it in ice cube trays is also a handy way to have small portions ready for cooking.

Tips for Taking Them Home

Lemons are relatively sturdy among citrus fruits, but if the skin gets scratched by branch thorns, those spots are prone to spoiling. When harvesting, cut the stem short and wrap each lemon in newspaper or similar material to prevent them from bumping into each other during transport.

Regional Guide -- Recommended Areas

Hiroshima Prefecture (Setoda and Ikuchi Island Area)

The largest domestic lemon producing area, nationally known as "Lemon Island." Ikuchi Island, connected by the Shimanami Kaido, enjoys year-round warmth and low rainfall, and the sight of lemon orchards spreading across steep terraced hillsides is spectacular. Multiple farms offer lemon picking experiences, and some even let you make lemonade with your freshly picked lemons. It is about 40 minutes by car from Onomichi City, and tours combining lemon picking with cycling the Shimanami Kaido are popular. The area is also rich in lemon-themed attractions, including the "Island Museum" and Lemon Valley.

Hiroshima Prefecture (Osakishimojima and Kure Area)

Osakishimojima in Kure City's Yutaka-machi is known as the home of "Ocho Lemon" and is another renowned Hiroshima lemon-producing area. You can visit lemon orchards while also exploring the historic townscape of the Mitarai district. It is about 2 hours by car from Hiroshima City.

Ehime Prefecture (Iwagi Island Area)

Iwagi Island, located along the Shimanami Kaido route, is known as the "Blue Lemon Island." Lemon orchards dot the island, and harvest experiences are available at several facilities. Day-trip plans combining lemon picking with Shimanami Kaido cycling are popular.

Frequently Asked Questions

Q. How much does lemon picking cost?

Costs vary by farm, but admission fees are typically around 500-1,000 yen, with harvested lemons sold by weight at roughly 500-1,000 yen per kilogram. Some farms offer a bag-filling option for about 1,500-2,000 yen.

Q. What is the difference between domestic and imported lemons?

The biggest difference is that domestic lemons are mostly grown without anti-fungal agents (such as OPP or TBZ) or wax, making the peel safe to eat. Additionally, imported lemons are harvested while still unripe and left to ripen during shipping, whereas domestic lemons are harvested close to full maturity, resulting in a dramatically richer aroma.

Q. Are the thorns on lemon trees dangerous?

Some varieties of lemon trees have sharp thorns. When harvesting, wear long sleeves and use the scissors provided by the farm to pick carefully. In recent years, more farms are planting varieties with fewer thorns (such as Eureka types).

Q. When is the best time to visit?

The best balance of juice and acidity comes during the yellow lemon season from January to March. If you want to experience the vibrant fragrance of green lemons, October through December is ideal.

Q. Can families with children enjoy it?

Children can enjoy lemon picking, but since some varieties have thorny branches, it is a good idea for adults to pick the low-hanging fruit and hand them to children. Making lemonade together after the harvest is a huge hit with kids.