"Asset Tax Navi" Releases Osaka City Version of Property Tax Overpayment Check Tool ── Adds diagnostic function corresponding to assessment value trends for each of the 24 wards

Mycat Co., Ltd. (Headquarters: Meguro-ku, Tokyo) has newly released the "Osaka City Version Property Tax Overpayment Check Tool," which allows users to check the appropriateness of property tax assessment values in Osaka City by ward, as part of its property tax check service "Shisanzei Navi" (https://shisanzei.xyz).

Tool URL: https://shisanzei.xyz/tools/osaka-check

Tool Overview and Main Features

This tool is a free web tool that allows real estate owners in Osaka City to easily check the appropriateness of the assessment value stated on their annual property tax statement.

Input Items (4 Steps in Total):

• Step 1: Property Location ── Selection from Osaka City's 24 wards, and input of town name/block number
• Step 2: Property Information ── Land area (sqm), total floor area of building (sqm), building structure (wood/steel frame/RC/SRC), year built
• Step 3: Current Assessment Value ── Land assessment value, building assessment value as stated on the tax statement (both can be approximate)
• Step 4: Usage Confirmation ── Residential land (small-scale residential land/general residential land), commercial land, other

Diagnostic Results Output:

1. Assessment Value Appropriateness Score (4 levels from A to D)

The input assessment value is cross-referenced with public land prices and road prices within the same ward, and its appropriateness is displayed as a score. Property tax assessment values are generally set at approximately 70% of public land prices, and the score is calculated based on the degree of deviation from this standard.

2. Ward-specific Assessment Value Trend Report

Displays the assessment value trend for the selected ward. For example, in Kita Ward and Chuo Ward (city center), where commercial and residential areas are mixed, cases where changes in land use classification affect assessment values are noted. In Suminoe Ward and Konohana Ward (waterfront areas), the possibility of land price fluctuations due to Expo-related development is indicated as a note.

3. Building Depreciation Check over Time

Checks whether the depreciation adjustment rate by structure over time has been appropriately applied to the building's assessment value. For older condominiums (RC and SRC structures), the depreciation of the building portion over time may not be fully reflected in the tax statement, in which case it will be displayed as "Requires Confirmation."

4. Analysis of Overpayment Risk Factors

If there is a possibility of overpayment, a list of potential factors (e.g., unreflected changes in land use classification, unapplied small-scale residential land special exemption, insufficient depreciation over time) will be displayed.

Technical Features

The assessment value check in this tool combines the following data sources and logic:

• Public Land Price Data: References public land prices announced annually by the Ministry of Land, Infrastructure, Transport and Tourism, by ward.
• Road Price Data: Regional road price levels based on the National Tax Agency's road price maps.
• Depreciation Adjustment Rate Table over Time: Adjustment rates by structure and age as stipulated in the Ministry of Internal Affairs and Communications' fixed asset valuation standards.
• Determination of Residential Land Special Exemption: Application determination for small-scale residential land (taxable standard amount 1/6) under 200 sqm and general residential land (taxable standard amount 1/3).

Background on Property Tax Assessment Errors

According to a survey by the Ministry of Internal Affairs and Communications, property tax assessment errors have been confirmed in 97% of local governments nationwide (Source: Ministry of Internal Affairs and Communications). Osaka City is no exception, and it is important to confirm whether assessment values are appropriately reviewed at the time of revaluation (every 3 years).

How to Use

1. Access the tool page (https://shisanzei.xyz/tools/osaka-check)

2. Input in 4 steps while referring to your tax statement

3. Diagnose immediately with the "Check" button...