Convert India Standard Time to Japan Standard Time
Instantly convert India Standard Time (IST) to Japan Standard Time (JST) with our free online calculator.
India Standard Time
10:50:51 AM
Wed, Jun 24 (IST)
Japan Standard Time
02:20:51 PM
Wed, Jun 24 (JST)
Convert a Specific Time
24-Hour Comparison
| IST | JST |
|---|---|
| 12:00 AM | 3.5:00 AM |
| 1:00 AM | 4.5:00 AM |
| 2:00 AM | 5.5:00 AM |
| 3:00 AM | 6.5:00 AM |
| 4:00 AM | 7.5:00 AM |
| 5:00 AM | 8.5:00 AM |
| 6:00 AM | 9.5:00 AM |
| 7:00 AM | 10.5:00 AM |
| 8:00 AM | 11.5:00 AM |
| 9:00 AM | 0.5:00 PM |
| 10:00 AM | 1.5:00 PM |
| 11:00 AM | 2.5:00 PM |
| 12:00 PM | 3.5:00 PM |
| 1:00 PM | 4.5:00 PM |
| 2:00 PM | 5.5:00 PM |
| 3:00 PM | 6.5:00 PM |
| 4:00 PM | 7.5:00 PM |
| 5:00 PM | 8.5:00 PM |
| 6:00 PM | 9.5:00 PM |
| 7:00 PM | 10.5:00 PM |
| 8:00 PM | 11.5:00 PM |
| 9:00 PM | 0.5:00 AM(+1d) |
| 10:00 PM | 1.5:00 AM(+1d) |
| 11:00 PM | 2.5:00 AM(+1d) |
How to Convert India Standard Time to Japan Standard Time
Formula
To convert India Standard Time (IST) to Japan Standard Time (JST): Convert IST to JST
About India Standard Time (IST)
India Standard Time (IST, IANA: Asia/Kolkata) is the civil time of the Republic of India and Sri Lanka, set at UTC+5:30 — one of the world's most populous 30-minute-offset time zones. India does not observe Daylight Saving Time per the Government of India directive (a brief DST trial in 1942-1945 during WWII was discontinued; subsequent proposals from 2010-2017 were rejected by the Indian Government citing minimal energy savings + agricultural sector disruption). IST is defined as the local mean solar time at 82.5°E longitude (passing through Shankargarh fort in Uttar Pradesh, with the reference clock at the National Physical Laboratory in New Delhi per the Indian Institute of Astrophysics). The 30-minute offset is preserved because India's east-west extent (68°E to 97°E) spans ~28° of longitude — approximately 2 hours of solar time — and the central meridian is most representative for a single unified zone. IST serves approximately 1.4 billion people in India + 22 million in Sri Lanka (Sri Lanka observes SLST = UTC+5:30, identical to IST). Major cities: Mumbai (12.5M), Delhi (16.8M, NCR 29M), Bengaluru (8.4M), Hyderabad (10M), Chennai (7M), Kolkata (4.5M), Ahmedabad (5.5M), Pune (3.1M). Affects: BSE/NSE stock exchanges, IPL Indian Premier League cricket schedules.
About Japan Standard Time (JST)
Japan Standard Time (JST, IANA: Asia/Tokyo) is the civil time of Japan, set at UTC+9:00 year-round (no DST). Japan observed Daylight Saving Time only briefly during American Occupation (1948-1951) and discontinued it after the Treaty of San Francisco. JST is also called Nippon Hyōjunji (日本標準時) and is officially maintained by the National Institute of Information and Communications Technology (NICT) — Japan operates a sophisticated atomic-clock-based timekeeping system at NICT Koganei facility with caesium beam frequency standards CSF-2 + Sr-87 optical lattice clock. JST is identical in offset to Korea Standard Time (KST), Yakutsk Time (Russian Far East), Western Indonesian Time WIT (eastern Indonesia), and Palau Time (PWT). JST serves Japan's approximately 125 million residents across 47 prefectures. Major JST cities: Tokyo (14M city, 37M metro — the world's largest metropolitan area by population), Yokohama (3.8M — Tokyo bay metro), Osaka (2.7M, Kansai region 19M metro), Nagoya (2.3M, Chukyo region 9.5M metro), Sapporo (1.9M — Hokkaido capital), Fukuoka (1.6M — Kyushu hub), Kobe (1.5M), Kawasaki (1.5M), Saitama (1.3M). Affects: TSE (Tokyo Stock Exchange) trading hours 09:00-15:00 JST, Tokyo Sumo Grand Tournaments, Shinkansen bullet-train scheduling, Tokyo Disney + USJ park operating hours.