| Mar 31,
2012 | Mar 31,
2013 | Mar 31,
2014 | Mar 31,
2015 |
|---|
| Cash and deposits | - | 25,168 | 24,882 | 4,413 |
|---|
| Notes and accounts receivable - trade | - | 22,803 | 21,654 | 20,966 |
|---|
| Inventories | - | 1,407 | 1,361 | 1,153 |
|---|
| Deferred tax assets | - | 1,643 | 1,504 | 1,429 |
|---|
| Other | - | 249 | 612 | 438 |
|---|
| Allowance for doubtful accounts | - | -1,653 | -1,483 | -1,822 |
|---|
| Current assets | - | 443 | 1,051 | 13,194 |
|---|
| Buildings and structures | - | 107,412 | 108,444 | 110,815 |
|---|
| Accumulated depreciation | - | -56,093 | -58,404 | -62,815 |
|---|
| Buildings and structures, net | - | 51,319 | 50,039 | 47,999 |
|---|
| Machinery, equipment and vehicles | - | 67,516 | 66,873 | 73,002 |
|---|
| Accumulated depreciation | - | -55,356 | -55,424 | -61,373 |
|---|
| Machinery, equipment and vehicles, net | - | 12,159 | 11,449 | 11,628 |
|---|
| Tools, furniture and fixtures | - | 5,039 | 5,147 | 5,172 |
|---|
| Accumulated depreciation | - | -4,263 | -4,293 | -4,394 |
|---|
| Tools, furniture and fixtures, net | - | 776 | 853 | 778 |
|---|
| Land | - | 83,502 | 82,686 | 82,132 |
|---|
| Leased assets | - | 7,545 | 8,098 | 8,340 |
|---|
| Accumulated depreciation | - | -3,684 | -4,499 | -5,496 |
|---|
| Leased assets, net | - | 3,860 | 3,599 | 2,843 |
|---|
| Construction in progress | - | 1,141 | 455 | 1,310 |
|---|
| Property, plant and equipment | - | 152,760 | 149,084 | 146,693 |
|---|
| Intangible assets | - | 4,638 | 4,399 | 3,324 |
|---|
| Investment securities | - | 14,704 | 17,178 | 18,127 |
|---|
| Long-term loans receivable | - | 1,313 | 1,171 | 1,082 |
|---|
| Net defined benefit asset | - | - | 49 | 91 |
|---|
| Deferred tax assets | - | 9,927 | 10,805 | 9,652 |
|---|
| Other | - | 3,248 | 3,328 | 221 |
|---|
| Allowance for doubtful accounts | - | -801 | -621 | -632 |
|---|
| Investments and other assets | - | 14,982 | 14,982 | 35,916 |
|---|
| Non-current assets | - | 14,982 | 14,982 | 35,916 |
|---|
| Assets | - | 15,426 | 16,033 | 49,111 |
|---|
| Notes and accounts payable - trade | - | 21,088 | 21,262 | 19,701 |
|---|
| Short-term loans payable | - | 9,832 | 10,301 | 3,300 |
|---|
| Current portion of long-term loans payable | - | 16,243 | 8,769 | 5,414 |
|---|
| Lease obligations | - | - | 2,250 | 1,982 |
|---|
| Income taxes payable | - | 468 | 882 | 395 |
|---|
| Accounts payable - other | - | - | 2,735 | 2,705 |
|---|
| Accrued expenses | - | - | 3,027 | 3,222 |
|---|
| Provision for bonuses | - | 109 | 193 | 200 |
|---|
| Other | - | 189 | 691 | 661 |
|---|
| Current liabilities | - | 313 | 884 | 13,334 |
|---|
| Bonds payable | - | 795 | 525 | 255 |
|---|
| Long-term loans payable | - | 27,989 | 31,417 | 19,563 |
|---|
| Lease obligations | - | - | 4,361 | 2,787 |
|---|
| Deferred tax liabilities for land revaluation | - | 13,118 | 12,942 | 11,701 |
|---|
| Lease and guarantee deposited on lands and rooms-NCL | - | 40,073 | 39,988 | 40,188 |
|---|
| Provision for directors' retirement benefits | - | 902 | 802 | 873 |
|---|
| Net defined benefit liability | - | - | 31,749 | 32,408 |
|---|
| Other | - | 3 | 7 | 9 |
|---|
| Non-current liabilities | - | 3 | 7 | 20,672 |
|---|
| Liabilities | - | 316 | 892 | 34,006 |
|---|
| Capital stock | - | 5 | 5 | 5 |
|---|
| Capital surplus | - | 14,977 | 14,977 | 14,977 |
|---|
| Retained earnings | - | 127 | 158 | 122 |
|---|
| Treasury shares | - | -1,023 | -1,003 | -998 |
|---|
| Shareholders' equity | - | 15,109 | 15,141 | 15,104 |
|---|
| Valuation difference on available-for-sale securities | - | 751 | 1,519 | 2,936 |
|---|
| Revaluation reserve for land | - | 3,028 | 2,708 | 3,731 |
|---|
| Remeasurements of defined benefit plans | - | - | -2,760 | -2,084 |
|---|
| Valuation and translation adjustments | - | 3,780 | 1,467 | 4,584 |
|---|
| Minority interests | - | 2,530 | 2,366 | 2,419 |
|---|
| Net assets | 15,082 | 15,109 | 15,141 | 15,104 |
|---|
| Liabilities and net assets | - | 15,426 | 16,033 | 49,111 |
|---|