Japan — sake technical vocabulary developed systematically by the Brewing Society of Japan (Jozo Gakkai) during 20th century
Japanese sake quality and character is described through a vocabulary of technical measurements that, when understood together, provide a complete flavour map of any given bottle. The three most important parameters are nihonshu-do (日本酒度, sake meter value or SMV), san-do (酸度, acidity), and amino-san-do (アミノ酸度, amino acid content). Nihonshu-do measures the specific gravity of sake relative to water on a scale where 0 is neutral, positive values are dry, and negative values are sweet — most modern premium sake falls between -3 (sweet) and +7 (dry). San-do measures the total organic acid content (lactic, malic, succinic acids) on a scale from 0.9 to 2.2+ — higher acidity produces sharper, more food-complementary sake; lower acidity creates rounder, gentler profiles. Amino-san-do (typically 0.5–2.5) measures glutamic acid and other amino acids that contribute umami, body, and richness — higher values create savouriness and weight; lower values produce cleaner, thinner profiles. The interplay of these three measures determines the overall impression: a sake with high nihonshu-do (dry), high san-do (acidic), and low amino acids is lean, sharp, and refreshing; high nihonshu-do with low acidity and high amino acids is dry but rich and savoury. Beyond these three, ginjo-ka describes the fruity ester aromatics of cold-fermented ginjo and daiginjo, while nama (unpasteurised) indicates freshness and slightly wild character. Tokubetsu (special), junmai (pure rice, no added alcohol), and honjozo (small amount of brewer's alcohol added) describe production categories, not flavour directly.
Conceptual framework — nihonshu-do, san-do, and amino-san-do together predict the sensory experience: dry, lean and sharp versus rich, savoury, and round
{"Nihonshu-do alone is misleading — dryness perception depends equally on acidity and body (amino acid content)","San-do (acidity) is the primary food-pairing driver — higher acidity sake complements richer, fattier foods by cutting through the palate","Amino-san-do creates umami and body — high amino acid sake amplifies savoury foods; low amino acid sake is clean with delicate dishes","Ginjo-ka (fruity esters) are temperature-sensitive and dissipate rapidly above 20°C — serve ginjo cold","Junmai designates no added alcohol; honjozo uses a small, flavour-brightening addition; the distinction affects texture and aromatics"}
{"When choosing sake for food pairing, prioritise san-do (acidity) over nihonshu-do — higher acidity cuts through fatty dishes better regardless of sweetness level","A quick tasting shorthand: high SMV + high acidity + low amino = sharp and refreshing (good with raw fish); low SMV + low acidity + high amino = rich and umami-heavy (good with grilled meat)","Nama-chozo (stored unpasteurised, pasteurised once before shipment) is a middle ground — retains fresh character without the short shelf life of fully unpasteurised nama sake","Kijoshu (sake brewed with sake instead of water) has extremely high amino-san-do and functions more like a dessert wine than table sake"}
{"Using nihonshu-do as the only dry-sweet indicator — a sake with SMV +5 but very low acidity can taste sweeter than SMV -2 with high acidity","Serving junmai daiginjo warm — heat destroys the fruity esters that define the category","Treating all non-junmai sake as inferior — honjozo adds brewer's alcohol deliberately for a clean, lighter body, not as a cheap substitute"}
John Gauntner — Sake Confidential; Philip Harper — The Insider's Guide to Sake; Brewing Society of Japan technical publications