| Mar 31,
2012 | Mar 31,
2013 | Mar 31,
2014 | Mar 31,
2015 |
|---|
| Cash and deposits | - | 1,182 | 1,168 | 1,828 |
|---|
| Notes and accounts receivable - trade | - | 2,819 | 2,968 | 2,937 |
|---|
| Merchandise | - | 29 | 36 | 31 |
|---|
| Work in process | - | 0 | 17 | 12 |
|---|
| Deferred tax assets | - | 4 | 2 | 1 |
|---|
| Prepaid expenses | - | 13 | 21 | 12 |
|---|
| Other | - | 3 | 5 | 34 |
|---|
| Allowance for doubtful accounts | - | -4 | -3 | -4 |
|---|
| Current assets | - | 1,352 | 1,245 | 1,924 |
|---|
| Buildings and structures | - | 125 | 138 | 137 |
|---|
| Accumulated depreciation | - | -38 | -55 | -62 |
|---|
| Buildings and structures, net | - | 87 | 82 | 75 |
|---|
| Vehicles | - | 11 | 13 | 13 |
|---|
| Accumulated depreciation | - | -1 | -5 | -9 |
|---|
| Vehicles, net | - | 10 | 8 | 5 |
|---|
| Tools, furniture and fixtures | - | 21 | 33 | 33 |
|---|
| Accumulated depreciation | - | -4 | -14 | -22 |
|---|
| Tools, furniture and fixtures, net | - | 16 | 19 | 11 |
|---|
| Construction in progress | - | - | 25 | 26 |
|---|
| Property, plant and equipment | - | 24 | 51 | 44 |
|---|
| Goodwill | - | 68 | 37 | 13 |
|---|
| Other | - | 2 | 2 | 1 |
|---|
| Intangible assets | - | 8 | 22 | 10 |
|---|
| Investment securities | - | 34 | 38 | 140 |
|---|
| Shares of subsidiaries and associates | - | 3,293 | 3,490 | 3,490 |
|---|
| Claims provable in bankruptcy, claims provable in rehabilitation and other | - | 17 | 25 | 10 |
|---|
| Long-term prepaid expenses | - | 0 | 0 | 0 |
|---|
| Deferred tax assets | - | 1 | 1 | 0 |
|---|
| Guarantee deposits | - | 47 | 56 | 17 |
|---|
| Insurance funds | - | 106 | 113 | 49 |
|---|
| Other | - | 6 | 6 | 6 |
|---|
| Allowance for doubtful accounts | - | -17 | -21 | -10 |
|---|
| Investments and other assets | - | 3,381 | 3,591 | 3,654 |
|---|
| Non-current assets | - | 3,414 | 3,664 | 3,708 |
|---|
| Deferred organization expenses | - | 13 | 10 | 7 |
|---|
| Business commencement expenses | - | 4 | 3 | 2 |
|---|
| Deferred assets | - | 17 | 13 | 10 |
|---|
| Assets | - | 4,783 | 4,923 | 5,641 |
|---|
| Accounts payable - trade | - | 1,378 | 1,551 | 1,494 |
|---|
| Accounts payable - other | - | 10 | 10 | 10 |
|---|
| Accrued expenses | - | 5 | 9 | 11 |
|---|
| Income taxes payable | - | 84 | 7 | 123 |
|---|
| Accrued consumption taxes | - | 6 | 7 | 15 |
|---|
| Deposits received | - | 3 | 3 | 3 |
|---|
| Provision for bonuses | - | 0 | 1 | 1 |
|---|
| Provision for loss on business liquidation | - | - | - | 65 |
|---|
| Other | - | 8 | 24 | 12 |
|---|
| Current liabilities | - | 752 | 841 | 1,455 |
|---|
| Long-term accounts payable - other | - | 9 | 9 | 9 |
|---|
| Provision for directors' retirement benefits | - | 227 | 212 | 209 |
|---|
| Net defined benefit liability | - | - | 0 | - |
|---|
| Other | - | - | 2 | 0 |
|---|
| Non-current liabilities | - | 236 | 223 | 219 |
|---|
| Liabilities | - | 752 | 841 | 1,455 |
|---|
| Capital stock | - | 1,384 | 1,385 | 1,386 |
|---|
| Deposit for subscriptions to shares | - | - | - | 1 |
|---|
| Capital surplus | - | 1,967 | 1,969 | 1,969 |
|---|
| Retained earnings | - | 725 | 773 | 872 |
|---|
| Treasury shares | - | -58 | -58 | -58 |
|---|
| Shareholders' equity | - | 4,018 | 4,068 | 4,170 |
|---|
| Valuation difference on available-for-sale securities | - | 3 | 5 | 7 |
|---|
| Valuation and translation adjustments | - | 3 | 5 | 7 |
|---|
| Subscription rights to shares | - | 9 | 9 | 9 |
|---|
| Minority interests | - | - | 20 | 26 |
|---|
| Net assets | 3,359 | 4,030 | 4,082 | 4,187 |
|---|
| Liabilities and net assets | - | 4,783 | 4,923 | 5,641 |
|---|