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Rule Mirror Lake

Kumamoto - Mirror Lake - Kyushu

Kumamoto, Kumamoto, Japan

Perfectly calm water for flawless reflections

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Asia/Tokyo
mirror-lake weather icon
Next opportunity
Glassy Mirror Reflections (glassy)
Kumamoto
Tue, Apr 21 · 01:00–04:00 · 3h window
Low confidence
38%
💨Wind Speed0.2-0.5m/s
mirror-lake weather icon
Glassy Mirror Reflections (glassy)
Kumamoto
Wed, Apr 22 · 01:00–05:00
💨Wind Speed:0.5-1m/s
Low
mirror-lake weather icon
Perfect Mirror Reflections
Kumamoto
Sun, Apr 26 · 15:00–16:00
💨Wind Speed:0.9m/s
Medium
mirror-lake weather icon
Perfect Mirror Reflections
Kumamoto
Sun, Apr 26 · 21:00–22:00
💨Wind Speed:0.9m/s
Medium
mirror-lake weather icon
Perfect Mirror Reflections
Kumamoto
Mon, Apr 27 · 02:00–05:00
💨Wind Speed:0.5-0.9m/s
Low

What this forecast looks for

Plain-language explanation from the rule

This forecast predicts mirror-calm water conditions for Kyushu's volcanic crater lakes, thermal spring ponds, and castle moats. We analyze wind speed, atmospheric stability, and tidal patterns to identify when reflections double the impact of the island's distinctive volcanic landscapes.

Kyushu's volcanic activity created numerous crater lakes in Kirishima highlands and Aso region, while onsen areas feature thermal-spring-fed ponds that rarely freeze. Historic Kumamoto Castle is surrounded by water features, and coastal areas offer sheltered bays for reflection photography. The subtropical climate means humidity-driven calm morning conditions.

What makes Kyushu reflection photography special:

  • Thermal spring mirrors - Lake Kinrinko in Yufuin fed by hot springs creates year-round reflections with Mount Yufu backdrop
  • Volcanic crater lakes - Kirishima highlands contain sacred lakes surrounded by volcanic peaks and mountain shrines
  • Castle moat reflections - Kumamoto Castle's defensive waters reflect reconstructed towers and original stone walls
  • Harbor twilight - Nagasaki's natural harbor provides sheltered water for city lights and hillside reflections

Lake Kinrinko delivers Kyushu's most reliable reflection photography—the spring-fed lake produces morning steam that lifts revealing perfect mirror conditions with Mount Yufu's twin peaks reflected. Best November through March before dawn when thermal mist settles leaving glass-calm water. Kirishima region contains sacred crater lakes surrounded by autumn color—arrive early as wind picks up by mid-morning. Kumamoto Castle's moats provide architectural reflections particularly beautiful when evening illumination begins. Nagasaki harbor at blue hour offers urban reflections with hillside buildings and city lights. Winter and early spring offer most consistent calm conditions.

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72-hour requirements breakdown

What passed or failed, hour by hour
3matching hours in the next 80 hoursJump to next match
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Asia/Tokyo
Wind Speed
≤ 1.0m/s
Wind Gusts
≤ 2.0m/s
Precipitation Chance
≤ 10.0%
Visibility
≥ 5000.0m
Sat, Apr 18
13:001.6m/s1.9m/s37%24135m
14:002.2m/s3m/s45%24134m
15:002.1m/s2.2m/s54%24135m
16:003.1m/s3.2m/s58%24134m
17:001.9m/s3.2m/s67%24134m
18:000.64m/s0.9m/s77%23937m
19:000.41m/s0.5m/s81%24134m
20:000.57m/s0.7m/s85%24135m
21:000.41m/s0.4m/s89%24134m
22:000.47m/s0.5m/s91%24134m
23:000.83m/s1m/s93%24135m
Sun, Apr 19
24:000.54m/s0.6m/s95%23657m
01:001.1m/s1.4m/s94%23780m
02:000.86m/s1.2m/s92%24135m
03:000.41m/s0.5m/s91%21142m
04:001.6m/s2.1m/s82%14191m
05:001.4m/s2m/s74%20608m
06:000.56m/s0.91m/s65%11327m
07:001.3m/s3.2m/s70%11399m
08:001.1m/s1.3m/s74%9758m
09:001.5m/s2.9m/s79%7461m
10:001.6m/s2.1m/s76%24135m
11:001.9m/s3.7m/s73%24135m
12:000.88m/s2.3m/s71%24135m
13:000.55m/s0.62m/s76%24135m
14:001.6m/s3.4m/s82%24134m
15:002m/s3.8m/s88%24134m
16:002.6m/s5.3m/s86%24135m
17:002.6m/s5.8m/s85%24134m
18:002.6m/s6m/s84%24134m
19:002.2m/s5.1m/s83%24134m
20:001.8m/s3.6m/s82%24135m
21:001.6m/s3.1m/s81%24134m
22:001.2m/s1.8m/s60%24135m
23:001m/s1.1m/s38%24135m
Mon, Apr 20
24:000.83m/s0.91m/s17%24134m
01:001.2m/s1.4m/s11%16035m
02:001.3m/s1.5m/s5.6%24134m
03:001.3m/s1.5m/s0%24134m
04:001.4m/s1.6m/s13%23966m
05:001.4m/s1.3m/s26%24134m
06:001.9m/s2.3m/s39%24135m
07:001.3m/s2.4m/s45%24134m
08:001.2m/s1.6m/s50%24135m
09:001.2m/s1.4m/s56%24134m
10:001.9m/s1.4m/s61%24135m
11:002.1m/s1.5m/s66%24135m
12:001.3m/s1.3m/s72%24134m
13:002.9m/s2m/s75%24135m
14:003.3m/s2.1m/s79%24134m
15:003.5m/s2.8m/s83%24134m
16:003.6m/s4m/s68%24134m
17:003.3m/s5m/s54%16273m
18:002.4m/s5m/s40%17347m
19:001.8m/s4.5m/s39%6893m
20:001.5m/s3.5m/s39%14924m
21:001.5m/s2.4m/s39%15340m
22:001.5m/s1.8m/s30%8163m
23:001.1m/s1.4m/s21%14036m
Tue, Apr 21
24:000.72m/s1.2m/s12%18468m
01:000.36m/s1.1m/s7.8%23514m
02:000.22m/s1m/s3.9%19427m
03:000.53m/s1.3m/s0%24135m
04:001.7m/s3m/s0%24135m
05:003m/s4.7m/s0%24135m
06:004.2m/s6.4m/s0%24135m
07:004m/s5.8m/s0%24135m
08:003.7m/s5.1m/s0%24135m
09:003.5m/s4.4m/s0%24135m
10:003.2m/s4.4m/s0%24135m
11:002.8m/s4.5m/s0%24135m
12:002.5m/s4.5m/s0%24135m
13:002.1m/s3.5m/s0%24135m
14:001.8m/s2.6m/s0%24135m
15:001.4m/s1.6m/s0%24135m
16:001.3m/s1.4m/s0%24135m
17:001.2m/s1.2m/s0%24135m
18:001m/s0.94m/s0%24135m
19:001.1m/s1m/s0%24135m
20:001.3m/s1.1m/s0%24135m
How to read: colored cells show whether each predicate requirement is met; highlighted rows mean the full rule matched (an opportunity).

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