What's open on Mountain Day 2027 in Japan?

Mountain Day 2027 falls on 11 August 2027.

Mountain Day on 11 August encourages time in the mountains. Banks and offices close; shops and convenience stores stay open.

Chain opening hours

Venue / Chain	Category	Holiday Status	Hours	Verification & Source
W2 Welcia 24h Pharmacy (ウエルシア)24/7 Duty 24時間営業店舗は国民の祝日も年中無休で営業 Editorial	Pharmacies & Chemists	Open	24 hours	2026-04-20 welcia-yakkyoku.co.jp
E2 ENEOS 24/7 (エネオス)24/7 Duty セルフSSおよび幹線道路店舗は祝日も24時間給油可能 Editorial	Petrol & EV Charging	Open	24 hours	2026-04-20 eneos.co.jp
EH Emergency Health Guidance #7119 (救急安心センター)24/7 Duty #7119にて祝日の当番医・救急医療機関の案内を24時間受付 Editorial#7119	Urgent Care & Clinics	Open	24 hours	2026-04-20 fdma.go.jp
7 7-Eleven Estimate	Convenience Stores	Open	Hours Vary	2026-08-23 7-eleven.co.jp
F FamilyMart Estimate	Convenience Stores	Open	Hours Vary	2026-08-23 family.co.jp
L Lawson Estimate	Convenience Stores	Open	Hours Vary	2026-08-23 lawson.co.jp
M Ministop Estimate	Convenience Stores	Open	Hours Vary	2026-08-23 ministop.co.jp
DY Daily Yamazaki Estimate	Convenience Stores	Open	Hours Vary	2026-08-23 daily-yamazaki.jp
S Seicomart Estimate	Convenience Stores	Open	Hours Vary	2026-08-23 seicomart.co.jp
IY Ito Yokado Estimate	Supermarkets & Groceries	Open	Hours Vary	2026-08-23 itoyokado.co.jp
A AEON Estimate	Supermarkets & Groceries	Open	Hours Vary	2026-08-23 aeonretail.jp
L Life Estimate	Supermarkets & Groceries	Open	Hours Vary	2026-08-23 lifecorp.jp
S Seiyu Estimate	Supermarkets & Groceries	Open	Hours Vary	2026-08-23 seiyu.co.jp
M Maruetsu Estimate	Supermarkets & Groceries	Open	Hours Vary	2026-08-23 maruetsu.co.jp
OS OK Store Estimate	Supermarkets & Groceries	Open	Hours Vary	2026-08-23 ok-corporation.jp
Y Yaoko Estimate	Supermarkets & Groceries	Open	Hours Vary	2026-08-23 yaoko-net.com
S Summit Estimate	Supermarkets & Groceries	Open	Hours Vary	2026-08-23 summitstore.co.jp
GS Gyomu Super Estimate	Supermarkets & Groceries	Open	Hours Vary	2026-08-23 gyomusuper.jp
B Beisia Estimate	Supermarkets & Groceries	Open	Hours Vary	2026-08-23 beisia.co.jp
Y York-Benimaru Estimate	Supermarkets & Groceries	Open	Hours Vary	2026-08-23 yorkbenimaru.co.jp
D Daiei Estimate	Supermarkets & Groceries	Open	Hours Vary	2026-08-23 daiei.co.jp
T Trial Estimate	Supermarkets & Groceries	Open	Hours Vary	2026-08-23 trial-net.co.jp
DQ Don Quijote Estimate	Retail & Shopping Malls	Open	Hours Vary	2026-08-23 donki.com
MJ McDonald's Japan (マクドナルド) 24時間店舗およびドライブスルーは国民の祝日も通常通り営業 Editorial	Restaurants & Cafes	Open	24 hours	2026-04-20 mcdonalds.co.jp
JP Japan Post (日本郵便 ゆうゆう窓口) 通常窓口は休業ですが主要郵便局の「ゆうゆう窓口」は祝日も営業 Editorial	Post & Parcel Lockers	Reduced hours	08:00–19:00	2026-04-20 post.japanpost.jp
MB MUFG Bank & ATMs (三菱UFJ銀行) 窓口は祝日休業ですがコンビニATMおよび店舗ATMコーナーは祝日稼働 Editorial	Banks & ATMs	Closed	Closed All Day	2026-04-20 bk.mufg.jp
JE JR East & Metro (JR東日本・東京メトロ) 国民の祝日は「休日ダイヤ」にて運行されます Editorial	Public Transit & Transport	Reduced hours	Hours Vary	2026-04-20 jreast.co.jp