Japanese with Manga

Sourness and acids with

酸 has the core meaning sour. In scientific compounds, it refers to acid and appears in terms involving oxygen and oxidation.

Etymology

This kanji is a phono-semantic compound comprised of 酉, associated with fermentation and liquor, and 夋 as the phonetic component (サン). Fermentation produces sharp, tangy flavors.

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Acids

(Carbonation)

炭酸(たんさん) means carbonic acid or carbonation. In everyday use, it often refers to carbonated water or a carbonated drink.

It combines 炭 (carbon) with 酸 (acid) to show carbonic acid or carbonation.

Manga panel from あずまんが大王 showing example of Bad at carbonated drinks with 炭酸.
あずまんが大王 » Volume 2年生 » Page 46

A case of the hiccups sends Ayumu down the path of trying each of her friends’ potential solutions. Tomo suggests drinking water as a cure.

歩(あゆむ):
「ジュースでもええんか？」
“Is juice okay too?”
とも:
「いいんじゃねーの？あ炭酸(たんさん)系(けい)なんか効(き)きそうだぞ」
“Yeah, that should be fine, right? Actually, carbonated stuff might work even better.”
歩(あゆむ):
「あかんあかん炭酸(たんさん)は苦手(にがて)やねん」
“No no, I can't do carbonated drinks. I'm bad with them.”
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Taste

(Sourness)

酸味(さんみ) means a sour taste or the degree of sourness in food and drink.

It combines 酸 (sour) with 味 (taste) to show a sour taste.

Manga panel from ご注文はうさぎですか？ showing example of That coffee with それ.
ご注文はうさぎですか？ » Volume 1 » Page 11

Cocoa tries to show off her ability to recognize the three types of coffee Chino made for her.

ココア:
「この酸味(さんみ)…キリマンジャロだね」
“This acidity… it's definitely Kilimanjaro.”
チノ:
「それがブルーマウンテンです」
“That is Blue Mountain.”
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