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Kosai
City in Shizuoka, Japan
Overview
Kosai is a tranquil city on the western edge of Shizuoka Prefecture, known for its access to Lake Hamana and its mix of traditional and modern Japanese life. The city's compact size makes it easy to explore, and visitors enjoy local seafood and nature spots.
Geographic Context
Jurisdiction
Japan
Prefecture
Shizuoka
Population
57,682
Time Zone
Asia/Tokyo
Coordinates
34.70°, 137.52°
Key Metrics
Safety Score
88
Female Safety
85
LGBTQ+ Safety
65
Traffic Safety
82
Food Safety
96
Monthly Cost
$1,284
Local Cost
$823
Local Income
$1,850
Cashless
60
English
35
Temperature
17.8°C
Summer Avg
25.0°C
Winter Avg
10.0°C
Record High
32.5°C
Record Low
0.7°C
Humidity
78%
Precipitation
1969 mm
City Vibrancy
5
Coworking
0
Cafes
0
Nightlife
0
Parks
5
Transport
2
Walk Score
2
Footways
4.0
Airport
—
Distance
—
Explore
Frequently Asked Questions
Data sources
Source-backed data
NASA POWER - Climate normals and monthly weather measurements rendered as city weather metrics. Updated 2026-03-22.
World Air Quality Index - Latest available city-level air quality station measurement. Updated 2025-12-05.
OpenStreetMap - Nearby amenities counted from OpenStreetMap-derived city extracts. Updated 2025-12-06.
OpenStreetMap transport extract - Walkability, footway density, and airport access metrics derived from mapped transport features. Updated 2025-12-06.
Oyster List city price model - City price estimates calibrated from local price surveys and jurisdiction-level cost signals. Updated 2026-01-14.
Estimated data
Oyster List AI-assisted estimates - Safety, lifestyle, income, and practical scores are model-assisted estimates derived from source-backed country and city signals. Confidence 68/100.
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