Japan Depreciation
The Japan Old Straight Line and Japan Old Declining Balance depreciation methods are used for assets purchased before April 1, 2007. When the asset value equals 5% of the original cost, it will be depreciated using the Straight Line method over 5 years (60 months) until the residual value equals 1 JPY.
The Japan Old Straight Line yearly depreciation limit is calculated as 90% of acquisition cost, multiplied by the depreciation rate.