🇯🇵VS🇹🇷
🌐Time Difference Calculator
KosaivsIstanbul
🇯🇵Kosai
01:28:21
PM
Sunday, May 3, 2026
+6h
Kosai ahead
🇹🇷Istanbul
07:28:21
AM
Sunday, May 3, 2026
Time ConverterKosai ↔ Istanbul
Click any row to convert — browse 2000–2050 with the arrows
| 📍Your Local Time detecting… | 🇯🇵 Kosai UTC+09:00 | 🇹🇷 Istanbul UTC+03:00 |
|---|
24-Hour OverviewKosai vs Istanbul
12a 4a 8a 12p 4p 8p 12a
🇯🇵KosaiBase
01:28 PM
🇹🇷Istanbul +-6h
07:28 AM
✓ Overlap
2h overlap
Work hours (9–5) Overlap Current time
Best Meeting HoursKosai & Istanbul
12am
6pm
1am
7pm
2am
8pm
3am
9pm
4am
10pm
5am
11pm
6am
12am
7am
1am
8am
2am
9am
3am
★
10am
4am
11am
5am
12pm
6am
1pm
7am
2pm
8am
3pm
9am
✓
4pm
10am
✓
5pm
11am
6pm
12pm
7pm
1pm
8pm
2pm
★
9pm
3pm
10pm
4pm
11pm
5pm
✓ Both working Kosai workingIstanbul working
May 2026 — Time DifferenceKosai vs Istanbul
+6hConstant this month
No DST transitions in May 2026•Applies to all 31 days
Quick Reference — Kosai → Istanbul
| 🇯🇵 Kosai (UTC+09:00) | 🇹🇷 Istanbul (UTC+03:00) |
|---|---|
| 12:00 AM | 6:00 PM (prev day) |
| 6:00 AM | 12:00 AM |
| 8:00 AM | 2:00 AM |
| 9:00 AM | 3:00 AM |
| 10:00 AM | 4:00 AM |
| 12:00 PM | 6:00 AM |
| 2:00 PM | 8:00 AM |
| 5:00 PM | 11:00 AM |
| 6:00 PM | 12:00 PM |
| 8:00 PM | 2:00 PM |
| 10:00 PM | 4:00 PM |
🇯🇵
Kosai business hours
= 3:00 AM – 11:00 AM in Istanbul
🇹🇷
Istanbul business hours
= 3:00 PM – 11:00 PM in Kosai
⇄
Midpoint meeting
1:00 PM in Kosai = 7:00 AM in Istanbul
More Tools
Related pages for Kosai and Istanbul
Location DetailsKosai vs Istanbul
👥 Population
59,770 approx.
vs
15,701,602 approx.
💵 Currency
Japanese Y
vs
Turkish Li
🗣️ Language
Japanese
vs
Turkish, Kurdish
📞 Calling Code
+81
vs
+90
📅 Weekend
Saturday,Sunday
=
Saturday,Sunday
🕐 Time Format
24H
=
24H
When to CallEnter a time in Kosai — see what it is in Istanbul
:
→
9:00 AM
Both cities in business hours — good time to call!
Quick pick:
Frequently Asked QuestionsKosai & Istanbul — Time Difference
Kosai is 6h ahead of Istanbul. Kosai uses Asia/Tokyo (UTCUTC+09:00), Istanbul uses Europe/Istanbul (UTCUTC+03:00).
The best overlap for business hours (9 AM–5 PM) is 3:00 PM–5:00 PM Kosai time.
When it is 12:00 PM in Kosai, it is 6:00 AM in Istanbul.
Not ideal right now. It is 1:28 PM in Kosai and 7:28 AM in Istanbul. Istanbul is outside business hours.
Neither Kosai nor Istanbul is currently observing Daylight Saving Time.
It is Sunday in both Kosai and Istanbul right now.
When it is 9:00 AM in Kosai, it is 3:00 AM in Istanbul.
Compare with Other Cities
See how Kosai and Istanbul differ from major world cities