Saitama is a tea-producing prefecture north of Tokyo where growers use Sayama Biire roasting and cold-climate cultivation to create rich, umami-focused matcha.
Saitama Matcha Producers and Their Unique Cultivation Methods
Saitama Prefecture stands as one of Japan’s northernmost tea-growing regions, where cold winters and distinctive processing techniques create matcha with bold flavors and rich umami. The Sayama Hills area, spanning cities like Sayama, Iruma, and Tokorozawa, produces what’s known as Sayama tea—accounting for just 2% of Japan’s tea market but earning recognition for its full-bodied character. The region’s matcha producers, including the cooperative Asuka tea factory and farms like Okutomi-en and Miyanoen, combine centuries-old traditions with modern innovations to craft teas that differ markedly from their southern counterparts.
Cold Climate Cultivation and Thick Leaf Development
Saitama’s colder winters force tea plants to develop thicker leaves packed with pectin and flavor compounds. This natural adaptation slows growth rates, limiting producers to two harvests annually compared to three or four in warmer regions like Shizuoka. The climate challenge becomes an advantage—leaves accumulate more nutrients during their extended growth period. For matcha production, farmers shade their fields for approximately 30 days before harvest, a practice less common in the Kanto region historically. This shading process boosts chlorophyll content and amino acids, creating the vibrant green color and smooth taste matcha drinkers expect.
The Sayama Hiire Roasting Technique
What truly sets Saitama producers apart is Sayama Hiire, a high-temperature roasting method reaching up to 120°C during the finishing stage. This technique, refined since the early 19th century, imparts a distinctive sweetness and nuttiness absent in Uji or Shizuoka teas. While Uji focuses on aroma and Shizuoka emphasizes color, Sayama prioritizes bold, lingering flavor. The roasting process caramelizes natural sugars in the leaves without compromising the umami profile. Producers apply this method to both regular tea and tencha (the leaf used for matcha), creating a flavor signature that experienced tea drinkers can identify immediately.
Cooperative Production and Premium Cultivars
The Asuka tea factory, established in 2006 by five farming families, represents a modern approach to traditional production. It’s the first full-scale matcha facility in the Kanto region with its own tencha roasting furnace. Producers grow specific cultivars chosen for matcha quality:
- Samidori: Reserved for high-grade matcha, cultivated in limited areas for premium offerings
- Okumidori: Valued for strong umami and aromatic qualities
- Gokou: Selected for its vibrant green color and smooth finish
Many Saitama farms practice integrated production, handling everything from cultivation to final packaging. This control allows experimentation with blends and processing variations. Tea cultivation here dates to the 14th century, but matcha production gained momentum after the Saitama Grand Tea Ceremony started in 1989, inspiring local farmers to invest in specialized equipment and techniques. The result is matcha that carries the region’s distinct personality—bolder and more assertive than the delicate sweetness of southern Japanese teas.
Saitama's inland climate creates large temperature swings between day and night, which actually benefits matcha production. This temperature variation slows down tea leaf growth, giving amino acids more time to develop in the leaves. That's what creates the rich umami and natural sweetness you'll find in Saitama matcha.
The region sits on the Musashino Plateau with well-drained red soil called Kanto Loam, which is mineral-rich and perfect for tea cultivation. While the cold climate limits harvests to about two times per year compared to five in warmer regions, it produces thicker, plumper leaves with fuller flavor profiles.
Sayama hi-ire is a high-temperature roasting process unique to Saitama that enhances both aroma and flavor complexity. This finishing technique sets Sayama matcha apart from other Japanese tea regions, adding a warm, nostalgic character to the final product.
The traditional saying goes: Shizuoka for color, Uji for aroma, and Sayama for flavor. That flavor reputation comes directly from this distinctive roasting method, which tea farmers in the region have perfected over generations.
Saitama producers employ a hand-picking technique called kokitsumi, which involves pinching and pulling only the softest leaves and buds. This selective approach ensures only the highest quality leaves make it into matcha production.
The region's shizen-jitate (natural cultivation) method allows tea branches to grow freely at various heights, making mechanical harvesting impractical. Hand-picking also lets farmers control quality at the source, which fits the local philosophy of own garden, own production, own sales.
Tea cultivation in Saitama traces back to the Kamakura period (1185-1333), though the region became famous for Sayama tea during the Edo period (1603-1868). Modern matcha production specifically expanded around 2006 when local tencha factories opened.
Today's Saitama matcha producers combine centuries-old techniques with innovation. Farms manage the entire process from cultivation through processing and sales, allowing them to develop unique flavor profiles and experiment with new processing methods while maintaining traditional quality standards.
After picking, Saitama farmers place tea leaves in locations with consistent airflow to carefully reduce moisture and enhance aroma. The key difference here is the monitoring—farmers watch the leaves closely to avoid over-withering, which would compromise color.
This controlled withering step happens before steaming and contributes to the distinctive aromatic profile of Sayama matcha. It's another example of how the region's producers have adapted traditional techniques to work with their specific climate conditions.
Matcha production concentrates around the Sayama Hills in western Saitama, particularly in three cities:
- Iruma
- Tokorozawa
- Sayama
These areas share fertile red soil with excellent drainage properties. The high altitude and well-drained terrain create ideal conditions for developing the thick, plump leaves that give Saitama matcha its characteristic full-bodied taste and rich umami content.