References
Sources
Figures were checked against the sources below in August 2026. Auction prices, export values and retail prices move. Verify anything time sensitive before quoting it on stage.
A note on this list
The three ingredient groups reproduce the reference page printed in the Asia Pours booklet, which is the authority for every figure, date and quote on this site. The booklet itself can be downloaded from the home page, so each claim here can be checked against the page it came from. Where a figure is time sensitive, the year it was checked is given with it. The General group also carries the two sources the site uses but the booklet does not: the bar ranking and the geocoder behind the map.
Two classes of source are marked. A commercial estimate is a market sizing sold as a research product, and the figures in one rarely match the figures in another. An observed retail listing is a price read off a shop page on a given date, not a market average. Both are used here because nothing more authoritative exists for those particular figures, and both are worth naming as what they are before quoting them.
Ube
- Coherent Market Insights. (2026, June 8). Ube market size, opportunities and YoY growth rate, 2033. https://www.coherentmarketinsights.com/industry-reports/ube-marketCommercial estimate
- Cros, J., Mahe, P., Nemorin, A., Maledon, E., Abraham, K., & Arnau, G. (2020). Genome-wide genotyping elucidates the geographical diversification and dispersal of the polyploid and clonally propagated yam (Dioscorea alata). Frontiers in Plant Science.
- Inquirer Business. (2026, March 1). Ube's global appeal takes root. https://business.inquirer.net/576736/ubes-global-appeal-takes-root
- Ladrido, R. C. (2026, July 3). Know your Philippine ube: History, culture, and identity. VERA Files. https://verafiles.org/articles/know-your-philippine-ube-history-culture-and-identity
- Matcharista. (2026). Ube shop: Lila Yam Pulver. https://matcharista.ch/shop-ube.htmlObserved retail listing, August 2026
- Moriya, C., et al. (2015). New acylated anthocyanins from purple yam and their antioxidant activity. Bioscience, Biotechnology, and Biochemistry.
- Nemorin, A., David, J., Maledon, E., Nudol, E., Dalon, J., & Arnau, G. (2013). Microsatellite and flow cytometry analysis to help understand the origin of Dioscorea alata polyploids. Annals of Botany, 112(5), 1069-1081.
- Philippine Root Crop Research and Training Center, Visayas State University. (2026, July 1). An ube story: The Philippines' purple gold.
- Transparency Market Research. (2025, December 17). Ube market size, share and growth forecast 2035.Commercial estimate
- USDA Foreign Agricultural Service. (2026, June). Philippines: Ube, purple yam. GAIN Report.
Yuzu
- DKSH Japan. (2024, November 15). DKSH Japan supports yuzu harvest in Kochi Prefecture, exploring yuzu's global potential.
- Japan External Trade Organization (JETRO). (n.d.). Yuzu: Highlighted Japanese ingredients.
- Nippon.com. (2026, January 18). Europe embraces the Japanese citron: One village's yuzu crusade. https://www.nippon.com/en/views/b06005/
- UC Riverside Citrus Variety Collection. (2023). Yuzu ichandrin (papeda hybrid): Citrus junos Sieb. ex Tanaka. CRC Accession 1216.
Matcha
- First Agri B2B. (2026). Matcha wholesale 2026: The complete B2B buyer's guide to sourcing from Japan. https://first-agri.jp/matcha/columns/040
- First Agri B2B. (2026, February 19). Uji matcha: Why Kyoto's tea region produces the world's finest matcha.
- Global Japanese Tea Association. (2025, May). Japanese tea report: Kyoto opening tencha auction.
- Grand View Research. (2026, June 24). Matcha market size, share and growth report, 2026-2033.Commercial estimate
- Maison Genkai. (2026, May). Best matcha in Switzerland 2026: Honest buying guide. https://maisongenkai.ch/en/blog/best-matcha-in-switzerland-why-its-so-hard-to-findObserved retail listing, August 2026
- Maison Koko. (2026, June 4). Traditional matcha shading: Honzu, tana-gake and why it matters.
- Maison Koko. (2026, June 24). Matcha shortage 2026: Causes, prices and how to buy real matcha.
- Matcharonin. (2025, October 19). Matcha kaufen Schweiz: Die besten Quellen und Tipps (2026).Observed retail listing, August 2026
- MatchaLand. (2026). Der beste Matcha der Schweiz. https://matchaland.ch/en/collections/der-beste-matcha-der-schweizObserved retail listing, August 2026
- One With Tea. (2026, June 15). The 2026 matcha shortage explained: A founder's view from the sourcing floor. https://onewithtea.com/blogs/news/2026-matcha-shortage-explained
- One With Tea. (2026, July 2). Matcha industry 2026: Record auctions and the shortage.
- Perfect Daily Grind. (2026, January 2). There's a matcha shortage in Japan: Where else can it grow?
- Senbird Tea. (2026, April 14). A guide to the history of matcha tea ceremonies.
- Wikipedia contributors. (2026). Shade cultivation of tea. Wikipedia.
- Yamamasa Koyamaen. (n.d.). History of matcha.
- Yuri Matcha. (2026, June 7). Kagoshima vs Uji matcha supply in 2026.
General
- European Commission, Directorate-General for Agriculture and Rural Development. (2023, September 27). EU-Japan: An additional 42 geographical indications protected for both sides.
- EUR-Lex. (n.d.). Economic partnership agreement between the EU and Japan. Publications Office of the European Union.
- The World's 50 Best Bars. (2025). The World's 50 Best Bars 2025: 1 to 50. https://www.the50.com/bars/best-in-the-world/list/1-50
- OpenStreetMap contributors. (2026). Nominatim geocoding service. Data licensed under the Open Database License. https://nominatim.openstreetmap.org/