Thailand develops taste for Japanese sweet potatoesーNHK WORLD-JAPAN NEWS

Key Concepts

• Beni Haruka: A premium Japanese sweet potato variety known for its high sugar content and creamy texture.
• Guilt-free Dessert: A marketing positioning for Japanese sweet potatoes as a natural, healthy alternative to processed sugary snacks.
• Value-Added Processing: The transformation of "substandard" (irregularly shaped/sized) potatoes into new products like sweet potato buns.
• Agricultural Intellectual Property: The challenge of controlling the spread of plant varieties (seeds/seedlings) across international borders.

Market Growth and Consumer Trends

The export value of Japanese roasted sweet potatoes has surged, more than doubling over the last five years to exceed $27 million. Southeast Asia serves as the primary market, with Thailand acting as a major hub for this growth.

In Bangkok, specialty shops are proliferating, with high-demand outlets selling medium-sized potatoes for 169 baht (~$5 USD) and moving up to 200 units daily. The popularity is driven by:

• Sensory Appeal: Consumers prefer the moist, creamy texture and natural sweetness over local Thai varieties.
• Health Consciousness: As Thai consumers reduce refined sugar intake, these potatoes are positioned as a "guilt-free" dessert.
• Digestive Benefits: Anecdotal evidence from consumers suggests improved digestive health, further cementing the product's status as a "superfood."

Product Innovation and Waste Reduction

To maximize market reach and profitability, distributors are utilizing potatoes that fail to meet retail aesthetic standards (due to irregular shapes or sizes). A notable example is the sweet potato bun:

• Methodology: The potato is mashed into a filling, wrapped in thin dough, and dusted with purple sweet potato powder.
• Marketing Strategy: The final product is designed to visually mimic a roasted sweet potato, making it highly "Instagrammable" and effective for social media promotion. This strategy allows distributors to monetize the entire harvest rather than discarding imperfect produce.

Competitive Landscape and Local Production

The success of Japanese imports has triggered local competition. In Lopburi province, Thai farmers have begun large-scale cultivation of the Beni Haruka variety.

• The "Beni Haruka" Factor: This variety is highly prized for its exceptional sweetness. Despite Japan tightening regulations six years ago to prevent the export of seeds and seedlings, the variety has successfully proliferated in Thailand.
• Pricing Strategy: Local farmers are selling their harvest at approximately 60% of the price of imported Japanese potatoes.
• Market Segmentation: While imported Japanese potatoes target wealthy consumers, local producers are strategically positioning their products to capture the middle-class market.

Strategic Outlook

The transcript highlights a significant tension in the agricultural export market. While Japanese sweet potatoes have successfully established a premium brand identity in Thailand, the emergence of high-quality, lower-cost local alternatives poses a long-term competitive threat.

As noted by local farmer Prasong Shinlurang, "Japanese ones are our ideal... but we aim to serve the middle class." This shift suggests that unless Japan can differentiate its product through branding, quality certification, or further innovation, it risks losing market share to domestic Thai production that leverages the same high-value genetic material.

Conclusion

The Japanese sweet potato market in Thailand is transitioning from a niche luxury import to a mainstream consumer staple. The combination of health-conscious consumer trends and creative product processing has fueled rapid expansion. However, the unauthorized spread of the Beni Haruka variety and the subsequent rise of cheaper, locally-grown alternatives indicate that the market is entering a phase of intense competition, necessitating a strategic response from Japanese exporters to maintain their competitive edge.