Did Kao Merit shampoo refill pouch (Japan) shrink?

Size FactsDid it shrink? Yes
Before340 ml
After320 ml
−5.9%smaller
Price per 100 ml · if the price stayed the same+6.2%Hypothetical: the size cut alone. The source recorded no shelf prices.

How big a cut? The joint 54th-largest of 56 documented soap, shampoo & body wash cuts (tied with 1 other); a bigger cut than 10% of all 1,366 cases in the library. See the biggest cuts →

When
2025 · reported 23 Sep 2026
Country
Japan
Brand
Kao
Category
Soap, Shampoo & Body Wash
Source
okaidokulab.com

Source and evidence

お買い得ラボ (okaidokulab.com) — 日用品の内容量は減っているか: 7 changes checked against the original (Sept 2026) okaidokulab.com

Source fetched 2026-10-29.

Cut with the 25 Mar 2025 Merit relaunch (per Kao's release). Per-ml shelf prices of old and new refills were about the same (¥1.02 vs ¥1.01) when the tracker checked.

Evidence
Typeprice tracker check against maker's release or product page
Confidencemedium

Check the math in the calculator.

What the source says

“エール 液体 ジェル1000g → つめかえ625g 2026年8月下旬 P&Gリリース(2026年8月18日) マース カルカン パウチ 70g → 60g — kalkan.jp の商品ページ 花王 キュキュット クリア除菌 本体 240mL → 220mL 2024年8月31日 花王のリリース(内容量の表あり) 花王 メリット シャンプー つめかえ 340mL → 320mL 2025年3月25日 花王のリリース(内容量の表あり) クラシエ いち髪 つめかえ 330mL → 320mL — クラシエの商品ページ ⚠ 「いつから」が空欄の2件は、日付を書いた告知を見つけられませんでした。…”

More from Japan: the Japan shrinkflation tracker has all 39 documented cases, sortable and filterable.

Topic guide: shampoo, soap and toothpaste shrinkflation, every documented case in one place, brand by brand.

More from Kao

All 2 Kao cases →

More soap, shampoo & body wash in Japan

All 2 in the case library →

Newest in soap, shampoo & body wash

Shampoo, soap and toothpaste shrinkflation →

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Cite this case

ShrinkRadar, “Did Kao Merit shampoo refill pouch (Japan) shrink? 340 ml → 320 ml”, https://shrinkradar.com/cases/kao-merit-shampoo-refill-pouch-japan-2025.html, accessed 2026-11-05. Original source: お買い得ラボ (okaidokulab.com) — 日用品の内容量は減っているか: 7 changes checked against the original (Sept 2026) (https://okaidokulab.com/shrink-vs-price/).

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