Our Correction Policy
We make mistakes. Numbers get transposed. Currency conversions go wrong. A source tells us one thing and the real data turns out to be different. When that happens, we fix the error and log it here. We don't stealth-edit our articles. If a number on this site changes, you'll find the reason on this page.
If you spot an error we haven't caught, please tell us. We appreciate it, we'll verify it, and if you're right, we'll correct it and credit you here (unless you prefer to remain anonymous).
2026 Corrections
March 2026 — New insulation standards note
Page: Apartment Hunting Guide
What changed: Added a note about the 2024 revision to Japan's Building Energy Efficiency Standards, which raised insulation requirements for new construction starting April 2025. Previously, we referenced only the 2015 standards.
Why: Reader who works in construction pointed out that the 2024 revision is significant and affects apartments built from 2025 onward. This means the "2015 or later" rule is now "2015 or later, with 2025+ being even better."
Correction by: Reader submission (anonymous)
February 2026 — Osaka average rent updated
Page: Homepage, Cost of Living, Climate Zones
What changed: Updated Osaka average rent for a 1K apartment from ¥95,000 to ¥110,000 (upper end) and from ¥65,000 to ¥70,000 (lower end). The mid-point figure changed from ¥80,000 to ¥90,000.
Why: Our 2025 survey data showed rent increases in Osaka's popular areas (Namba, Umeda, Tennoji) due to increased demand from remote workers leaving Tokyo. The previous figure was from 2023 data and no longer reflected the market.
Correction by: Internal data review based on 2025 survey
February 2026 — Tokyo summer electricity range narrowed
Page: Cost of Living
What changed: Narrowed the Tokyo summer electricity range from ¥10,000–¥20,000 to ¥10,000–¥18,000. Removed the ¥20,000 figure as an outlier that only applied to very old, poorly insulated 1LDK units, which we address separately.
Why: The ¥20,000 figure was technically accurate for a specific subset of apartments but was being quoted as the general case. We revised to be more representative of standard 1K apartments.
Correction by: Internal data review
January 2026 — Annual data refresh
Page: All cost-related pages
What changed: Full annual update of all cost data based on 2025 survey responses (54 respondents across 8 cities). Updated rent ranges, utility costs, and heating estimates for Tokyo, Osaka, Fukuoka, Sapporo, Kanazawa, and Naha.
Why: Scheduled annual refresh. The 2024 data was replaced with 2025 data reflecting post-pandemic rent changes and utility rate adjustments.
Correction by: Scheduled annual update
2025 Corrections
October 2025 — Hokkaido snowfall figure corrected
Page: Climate Zones
What changed: Changed Sapporo average annual snowfall from "8 meters" to "6 meters." The 8-meter figure included mountain areas near Sapporo, not the city proper.
Why: Reader from Sapporo pointed out that 8 meters is misleading for city-level data. The Sapporo city proper average is approximately 5.7 meters, which we rounded to 6 meters for clarity.
Correction by: Reader submission — thank you, H.S. in Sapporo
August 2025 — Fukuoka AC season length revised
Page: Cost of Living
What changed: Extended the stated Fukuoka AC season from "April–October" to "April–November" based on survey data showing continued AC use through November in 60% of respondent households.
Why: Our own experience and survey data showed that Fukuoka's humidity persists into November even when temperatures moderate. Readers were underestimating their annual AC costs.
Correction by: Internal data review
May 2025 — Contact email address fixed
Page: All pages
What changed: Fixed a typo in the footer email address on several pages. Was "he@nipponclimat.com" — corrected to "hey@nipponclimat.com."
Why: A copy-paste error during the initial site build. Embarrassing. We checked — the wrong address wasn't receiving mail, so no messages were lost.
Correction by: Internal review
March 2025 — Kanazawa kerosene cost range widened
Page: Cost of Living
What changed: Widened the Kanazawa winter kerosene cost range from ¥12,000–¥20,000 to ¥15,000–¥25,000 per month. Added explanatory text about why kerosene costs are higher in Kanazawa than in Sapporo despite similar temperatures.
Why: Reader survey from Kanazawa showed higher actual kerosene consumption than our initial estimate. The difference is due to building age — Kanazawa has more older, less insulated buildings compared to Sapporo's newer construction.
Correction by: Reader survey data
How We Handle Corrections
When we identify an error, here's what happens:
- We verify the error with at least one additional source or data point
- We correct the content on the relevant page(s)
- We add an entry to this corrections log within 48 hours
- If the error was significant (affecting cost calculations or health advice), we note the correction at the bottom of the relevant article for 30 days
Report an Error
Found something that looks wrong? Contact us with the page URL, the incorrect information, and what you believe is correct. If you have a source (your own bill, a public data set, etc.), even better. We'll investigate and respond within 5 business days.
We credit readers who submit corrections unless they ask to remain anonymous. First name and initial only — we never publish full contact details without explicit permission.