15-19 (ages when migration related to educational advance and entry to labor market predominates) is remarkably high. In intra-metropolitan migration, the 25-29 age group and its adjacent categories display high percentages, implying that job-related migration accompanied by new job, job change, or job transfer is active within the metropolitan regions. Ages 35-54 show high percentages in “inter-metropolitan” migration.

## 5 Migration patterns and reasons for migration

Lastly, the relationships between migration patterns and reasons for moves are considered. Table 15 shows the number of migrants by the above migration pattern and by reason for move (six categories).

Table 15 Distribution of movers by different reasons for migration (1991-1996)

Reason for migration	Total	To receive higher education	For work-related reasons	For reason related to housing	To move in with parents/children	Accompanying parents/guardians	Following a marital arrangement	For other reasons
Total	8,700	241	1,199	1,622	303	3,865	1,177	293 (people)
100.0	2.8	13.8	18.6	3.5	44.4	13.5	3.4 (%)
Within a metropolitan area	3,450	27	164	890	123	1,586	516	144
Intra-prefecture	100.0	0.8	4.8	25.8	3.6	46.0	15.0	4.2
Within a metropolitan area	168	10	36	27	2	41	45	7
Toward the center	100.0	6.0	21.4	16.1	1.2	24.4	26.8	4.2
Within a metropolitan area	261	7	34	63	10	95	41	11
Toward the peripheral	100.0	2.7	13.0	24.1	3.8	36.4	15.7	4.2
Within a metropolitan area	111	7	10	25	6	46	13	4
Within the peripheral	100.0	6.3	9.0	22.5	5.4	41.4	11.7	3.6
Metropolitan area-to-	258	13	123	1	3	98	15	5
metropolitan area	100.0	5.0	47.7	0.4	1.2	38.0	5.8	1.9
Non-metropolitan areas	600	74	231	20	12	212	40	11
to metropolitan areas	100.0	12.3	38.5	3.3	2.0	35.3	6.7	1.8
Metropolitan areas	470	12	146	22	22	223	29	16
to non-metropolitan areas	100.0	2.6	31.1	4.7	4.7	47.4	6.2	3.4
Within non-metropolitan areas	2,806	56	255	566	115	1,272	448	94
Intra-prefecture	100.0	2.0	9.1	20.2	4.1	45.3	16.0	3.3
Within non-metropolitan areas	576	35	200	8	10	292	30	1
Prefecture-to-prefecture	100.0	6.1	34.7	1.4	1.7	50.7	5.2	0.2

“Admission to school” indicates a high number in “non-metropolitan to metropolitan.” “Job-related reason,” which includes “obtained job,” “changed job,” “job transfer” and “retirement,” displays high numbers for relatively long-distance movements such as “inter-metropolitan,” “non-metropolitan to metropolitan,” “intra-non-metropolitan (inter-prefecture),” and “metropolitan to non-metropolitan.” We could thus understand that a number of long-distance migrations are connected to job-related reasons. Numbers of “housing-related reason” are high in intra-metropolitan migrations (except “periphery to center”) and “intra-non-metropolitan (intra-prefecture),” but are very small in “inter-metropolitan” and “intra-non-metropolitan (inter-prefecture).” This means that the vast majority of housing-related migrations are short distance. “To live with/near parents/children” shows relatively high numbers in “intra-metropolitan (periphery to periphery)” and “metropolitan to non-metropolitan.” The number of “moved with parents/spouse” is small in “intra-metropolitan (periphery to center).” This implies that family migration is relatively rare in migration bound for city center. Migration by marriage, on the other hand, shows a high number in “intra-metropolitan (periphery to center).” But its numbers are quite small in long-distance movement patterns such as “intra-non-metropolitan (inter-prefecture)” and “inter-metropolitan.”