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Ohta's Isan 太田胃散 140g Ad#OTC Medicines & Health GoodsJP¥1,180 Ohta's Isan 太田胃散 140g Japan price
The math
Japan price incl. taxJP¥1,180
Tax-free price (paid in store)JP¥1,073
In USD≈ US$7
⚠️ Needs JP¥5,000 (excl. tax) at one store on one day
 Japan consumption tax 10% (food 8%)

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Ohta's Isan

太田胃散 · 太田胃散 140g

Price JP¥1,180 · tax-free JP¥1,073
Flights OK on the plane
Source Kakaku.com · 10-23
OTC Medicines & Health Goods

As of 2026-10-23, the lowest online price on Kakaku.com is JP¥1,180 (incl. tax); of the 21 destinations we check, it is restricted in all 21.

A long-established Japanese powdered stomach medicine combining herbal ingredients and antacids. Class 2 OTC drug; the Japanese package insert lists overdrinking, heartburn, bloating, indigestion, and more. The can comes with a measuring spoon; for travel, consider the 48-packet version.

BestJapanBuyData updated 2026-10-23 · sources at the end

Lowest online price (incl. tax) JP¥1,180 (shipping not included). At a tax-free shop you pay the tax-free price JP¥1,073 at the register (≈ US$7).Below the threshold on its own: you need JP¥5,000 (excl. tax) at one store on one day to buy tax-free. How the new tax-free refund works ›

Customs rules differ by country and region. Will it work in your country? →

Flights: OK on the plane. No batteries, liquids or dangerous goods: OK in carry-on or checked baggage

Good for: People who want a household stomach remedy for overeating and overdrinking | Not for: People who prefer tablets over powder (Ohta's Isan A tablets are also sold)

Sold at drugstores and pharmacies in Japan. Find the nearest store.

  • #JapanShopping
  • #JapanOTCMedicinesHealthGoods
  • #OhtasIsan
  • #TaxFreeJapan

Edited 2026-10-23 · prices for reference only · names: Ohta's Isan / 太田胃散

Japan price and tax refund

Price in Japan

Lowest online price
JP¥1,180–1,880
Tax-free price
JP¥1,073
In USD (reference)
≈ US$7

Japan price: Kakaku.com, 2026-10-23 (shipping not included)
Below JP¥5,000 (excl. tax) on its own: combine purchases at one store on one day to buy tax-free
USD rate JP¥1 = US$0.006377 (2026-10-23) · Prices are for reference only; check in store.

How tax-free shopping works

Until Oct 31, 2026: show your passport at a tax-free shop and pay the tax-free price at the register (at least JP¥5,000 excl. tax per store per day).

Calculate the refund · New tax-free rules explained

Specs

BrandOhta's Isan / 太田胃散
Model太田胃散 140g
TypeStomach / digestive
Japanese drug classificationClass 2 OTC drug (第2類医薬品)
Contains ephedrine-type / codeine-type ingredients (per ingredient list)No
Volume / count140g
Main ingredients (per package)7 crude drugs incl. cinnamon bark and fennel + antacids incl. sodium bicarbonate, Biodiastase (digestive enzyme)

Spec sources: Ohta's Isan official site

Taking it home: country by country

Customs rules differ by country; check your own customs authority before you travel. Pick your country to put it at the top.

Country / regionResultWhat to know
Mainland China Restricted Medicines: reasonable amounts for personal use only; keep the original packaging and leaflet
Hong Kong Restricted Medicines: rules on quantities and ingredients differ by country. Bring only a reasonable personal supply and keep the leaflet and original packaging.
Macao Restricted Medicines: rules on quantities and ingredients differ by country. Bring only a reasonable personal supply and keep the leaflet and original packaging.
Taiwan Restricted Medicines: rules on quantities and ingredients differ by country. Bring only a reasonable personal supply and keep the leaflet and original packaging.
Singapore Restricted Medicines: rules on quantities and ingredients differ by country. Bring only a reasonable personal supply and keep the leaflet and original packaging.
South Korea Restricted Medicines: rules on quantities and ingredients differ by country. Bring only a reasonable personal supply and keep the leaflet and original packaging.
United States Restricted Medicines: rules on quantities and ingredients differ by country. Bring only a reasonable personal supply and keep the leaflet and original packaging.
Thailand Restricted Medicines: rules on quantities and ingredients differ by country. Bring only a reasonable personal supply and keep the leaflet and original packaging.
Malaysia Restricted Medicines: rules on quantities and ingredients differ by country. Bring only a reasonable personal supply and keep the leaflet and original packaging.
Philippines Restricted Medicines: rules on quantities and ingredients differ by country. Bring only a reasonable personal supply and keep the leaflet and original packaging.
Vietnam Restricted Medicines: rules on quantities and ingredients differ by country. Bring only a reasonable personal supply and keep the leaflet and original packaging.
Indonesia Restricted Medicines: rules on quantities and ingredients differ by country. Bring only a reasonable personal supply and keep the leaflet and original packaging.
India Restricted Medicines: rules on quantities and ingredients differ by country. Bring only a reasonable personal supply and keep the leaflet and original packaging.
Australia Restricted Medicines: rules on quantities and ingredients differ by country. Bring only a reasonable personal supply and keep the leaflet and original packaging.
New Zealand Restricted Medicines: rules on quantities and ingredients differ by country. Bring only a reasonable personal supply and keep the leaflet and original packaging.
Canada Restricted Medicines: rules on quantities and ingredients differ by country. Bring only a reasonable personal supply and keep the leaflet and original packaging.
United Kingdom Restricted Medicines: rules on quantities and ingredients differ by country. Bring only a reasonable personal supply and keep the leaflet and original packaging.
Germany Restricted Medicines: rules on quantities and ingredients differ by country. Bring only a reasonable personal supply and keep the leaflet and original packaging.
France Restricted Medicines: rules on quantities and ingredients differ by country. Bring only a reasonable personal supply and keep the leaflet and original packaging.
Italy Restricted Medicines: rules on quantities and ingredients differ by country. Bring only a reasonable personal supply and keep the leaflet and original packaging.
Spain Restricted Medicines: rules on quantities and ingredients differ by country. Bring only a reasonable personal supply and keep the leaflet and original packaging.

Flights (all destinations): OK on the plane: No batteries, liquids or dangerous goods: OK in carry-on or checked baggage

This model: TBD. Results follow published standards; some buildings or hotels may differ.

Overseas vs Japan-only model

No counterpart model listed yet.

Reviews

Rating and pros/cons TBD.

Where to buy

In Japan

Sold at drugstores and pharmacies in Japan.

Find the nearest store

Japanese phrases to show staff · Checkout checklist · Calculate the price after refund

Frequently asked questions

Can I take Ohta's Isan 太田胃散 140g home from Japan?

Of the 21 destinations we check, it is restricted in all 21. See the table "Taking it home: country by country" on this page for each country and region.

How much is the Ohta's Isan 太田胃散 140g in Japan tax-free?

As of 2026-10-23, the lowest online price on Kakaku.com is JP¥1,180 including tax. Tax-free or after the refund it is JP¥1,073. It costs less than JP¥5,000 (excl. tax) on its own, so you need to combine purchases at one store on one day to buy tax-free. From Nov 1, 2026, you pay the tax-included price in store and get the tax refunded when you leave Japan (a fee may apply).

Where can I buy the Ohta's Isan 太田胃散 140g in Japan?

Sold at drugstores and pharmacies in Japan. The price we list is from Kakaku.com (2026-10-23); prices in store may differ.

Related Q&A

Sources

Updated 2026-10-23Prices are for reference only; check in store.MarkdownJSON