| Sep 30,
2012 | Sep 30,
2013 | Sep 30,
2014 | Mar 31,
2015 |
|---|
| Cash and deposits | - | 645 | 1,041 | 967 |
|---|
| Notes and accounts receivable - trade | - | - | 2,184 | 2,136 |
|---|
| Merchandise | - | 938 | 4 | 0 |
|---|
| Work in process | - | - | 7 | - |
|---|
| Raw materials and supplies | - | 29 | 47 | 14 |
|---|
| Deferred tax assets | - | 161 | 79 | 69 |
|---|
| Other | - | 65 | 9 | 114 |
|---|
| Allowance for doubtful accounts | - | -166 | -146 | -3 |
|---|
| Current assets | - | 3,625 | 2,866 | 1,994 |
|---|
| Buildings and structures | - | 1,473 | 1,804 | 1,008 |
|---|
| Accumulated depreciation | - | -545 | -636 | -333 |
|---|
| Buildings and structures, net | - | 928 | 1,168 | 674 |
|---|
| Land | - | 169 | 172 | - |
|---|
| Leased assets | - | 28 | 26 | 151 |
|---|
| Accumulated depreciation | - | -78 | -101 | -112 |
|---|
| Leased assets, net | - | 28 | 26 | 21 |
|---|
| Construction in progress | - | 19 | 7 | 11 |
|---|
| Tools, furniture and fixtures | - | 11 | 9 | 353 |
|---|
| Accumulated depreciation | - | -317 | -383 | -280 |
|---|
| Tools, furniture and fixtures, net | - | 86 | 9 | 7 |
|---|
| Other | - | 28 | 158 | 135 |
|---|
| Accumulated depreciation | - | -21 | -126 | -113 |
|---|
| Other, net | - | 7 | 31 | 22 |
|---|
| Property, plant and equipment | - | 94 | 78 | 69 |
|---|
| Goodwill | - | 157 | 185 | 125 |
|---|
| Software | - | 107 | 73 | 61 |
|---|
| Other | - | 2 | 1 | 1 |
|---|
| Intangible assets | - | 268 | 261 | 188 |
|---|
| Investment securities | - | 2,396 | 2,530 | 2,670 |
|---|
| Long-term accounts receivable - other | - | 531 | 545 | 208 |
|---|
| Claims provable in bankruptcy, claims provable in rehabilitation and other | - | 1 | 3 | 3 |
|---|
| Long-term deposits | - | - | - | 1,028 |
|---|
| Insurance funds | - | - | - | 118 |
|---|
| Lease and guarantee deposits | - | 121 | 118 | 114 |
|---|
| Deferred tax assets | - | 128 | 139 | 123 |
|---|
| Other | - | 25 | 18 | 37 |
|---|
| Allowance for doubtful accounts | - | -10 | -15 | -507 |
|---|
| Investments and other assets | - | 4,031 | 4,108 | 4,611 |
|---|
| Non-current assets | - | 4,393 | 4,447 | 4,868 |
|---|
| Assets | - | 8,019 | 7,313 | 6,862 |
|---|
| Accounts payable - trade | - | 43 | 65 | 85 |
|---|
| Short-term loans payable | - | 377 | 511 | 106 |
|---|
| Current portion of long-term loans payable | - | 419 | 422 | 372 |
|---|
| Current portion of bonds | - | 66 | 66 | 1,566 |
|---|
| Accounts payable - other | - | 366 | 291 | 467 |
|---|
| Lease obligations | - | 20 | 20 | 17 |
|---|
| Income taxes payable | - | 6 | 7 | 10 |
|---|
| Unearned revenue | - | 703 | 6 | 7 |
|---|
| Provision for bonuses | - | 241 | 14 | 17 |
|---|
| Allowance for cancellation adjustments | - | 46 | 39 | 38 |
|---|
| Other | - | 9 | 39 | 31 |
|---|
| Current liabilities | - | 1,309 | 964 | 2,605 |
|---|
| Bonds payable | - | 1,632 | 1,566 | 33 |
|---|
| Long-term loans payable | - | 692 | 455 | 289 |
|---|
| Lease obligations | - | 30 | 26 | 22 |
|---|
| Provision for directors' retirement benefits | - | 0 | 89 | 84 |
|---|
| Deferred tax liabilities | - | 86 | 163 | 161 |
|---|
| Net defined benefit liability | - | - | 229 | 206 |
|---|
| Asset retirement obligations | - | 137 | 174 | 132 |
|---|
| Other | - | 9 | 11 | 10 |
|---|
| Non-current liabilities | - | 2,490 | 2,241 | 541 |
|---|
| Liabilities | - | 3,799 | 3,205 | 3,146 |
|---|
| Capital stock | - | 1,554 | 1,737 | 1,739 |
|---|
| Deposit for subscriptions to shares | - | - | 0 | - |
|---|
| Capital surplus | - | 1,227 | 998 | 786 |
|---|
| Retained earnings | - | 1,438 | 1,524 | 1,309 |
|---|
| Treasury shares | - | -190 | -490 | -490 |
|---|
| Shareholders' equity | - | 4,029 | 3,770 | 3,345 |
|---|
| Valuation difference on available-for-sale securities | - | 156 | 294 | 337 |
|---|
| Foreign currency translation adjustment | - | -19 | -3 | - |
|---|
| Remeasurements of defined benefit plans | - | - | -7 | -4 |
|---|
| Valuation and translation adjustments | - | 156 | 294 | 337 |
|---|
| Subscription rights to shares | - | 35 | 45 | 34 |
|---|
| Minority interests | - | 128 | 448 | 284 |
|---|
| Net assets | 3,181 | 4,220 | 4,108 | 3,716 |
|---|
| Liabilities and net assets | - | 8,019 | 7,313 | 6,862 |
|---|