Table 1. Key features of the study sample.
| All (A) | Work (B) | Not work (C) | ||||
|
| ||||||
| (% of total) | [B/A, %] | [C/A, %] | ||||
| Men | 706,192 | (47.6) | 512,356 | [72.6] | 193,836 | [27.4] |
| Women | 777,399 | (52.4) | 320,072 | [41.2] | 457,327 | [58.8] |
| Aged 55–59 years | 521,216 | (35.1) | 380,859 | [73.1] | 140,357 | [26.9] |
| Aged 60–64 years | 505,914 | (34.1) | 276,239 | [54.6] | 229,675 | [45.4] |
| Aged 65–69 years | 456,461 | (30.8) | 175,330 | [38.4] | 281,131 | [61.6] |
|
| ||||||
| (% of total) | (% of total) | (% of total) | ||||
| Marital status | ||||||
| Married | 1,219,221 | (82.2) | 704,596 | (84.6) | 514,625 | (79.0) |
| Unmarried | 58,393 | (3.9) | 29,997 | (3.6) | 28,396 | (4.4) |
| Divorced/separated | 205,977 | (13.9) | 97,835 | (11.8) | 108,142 | (16.6) |
| Household structure | ||||||
| Alone | 130,636 | (8.8) | 68,317 | (8.2) | 62,319 | (9.6) |
| Husband and wife | 475,421 | (32.0) | 237,681 | (28.6) | 237,740 | (36.5) |
| Husband and wife and an unmarried child(ren) | 351,380 | (23.7) | 223,448 | (26.8) | 127,932 | (19.6) |
| Single parent and an unmarried child(ren) | 55,487 | (3.7) | 29,801 | (3.6) | 25,686 | (3.9) |
| Three-generation | 303,455 | (20.5) | 173,615 | (20.9) | 129,840 | (19.9) |
| Other | 167,212 | (11.3) | 99,566 | (12.0) | 67,646 | (10.4) |
| Having own house | 1,286,980 | (86.7) | 723,600 | (86.9) | 563,381 | (86.5) |
|
| ||||||
| Mean | SD | Mean | SD | Mean | SD | |
| Age | 61.8 | (4.3) | 60.6 | (4.1) | 63.2 | (4.1) |
| Household expenditure (monthly, thousand JPY) | 270.2 | (327.9) | 279.6 | (349.0) | 258.0 | (298.1) |
|
| ||||||
| Total | 1,483,591 | 832,428 | 651,163 | |||
SD, standard deviation.