Survey Report on Two-Generation Homes: Households Living with Parents vs. Living Separately

LIXIL Housing Research Institute conducted a survey targeting households living with their parents and those living separately, focusing on two-generation homes. The valid responses came from 400 married individuals aged 20s to 40s: 197 living with their parents and 203 living separately. The survey was conducted from February 16 to 22, 2026.

Summary of Survey Results

Among those currently living separately from their parents, future intentions include: continuing to live separately (34.0%), living nearby (14.3%), planning to cohabit in the future (11.8%), and considering cohabitation only if parental care becomes necessary (4.9%).

Satisfaction levels among those cohabiting with parents are very high, exceeding 80%. The top three appealing aspects of cohabitation are: support with housework and childcare (39.6%), reduction of financial burden (35.5%), and peace of mind in emergencies (35.0%). In contrast, for those living separately, the top three appealing factors are: peace of mind in emergencies (31.0%), easy interaction with parents (28.1%), and ability to show filial piety (28.1%).

When all respondents were asked about their ideal layout for a two-generation home, the 'fully separated type' accounted for 56.8%, while the 'fully cohabiting type' reached 41.8%, higher than expected.

Regarding concerns about two-generation homes, those currently cohabiting cited differences in lifestyle rhythms (23.4%) and difficulty inviting friends over (21.8%) as top issues. Among those living separately, the primary concern was also differences in lifestyle rhythms (39.4%), followed by noise and differences in daily schedules (20.7%).

Summary of Survey Results

・Future intentions of those currently living separately from parents (biological or in-laws):

Continue living separately: 34.0% Live nearby (close proximity): 14.3% Cohabit with parents in the future: 11.8% Consider cohabitation only if care is needed: 4.9%

・Satisfaction with cohabitation among those currently living with parents:

Very satisfied: 28.4% Somewhat satisfied: 51.8% Total satisfied: 80.2%

・Top 3 reasons those living with parents find cohabitation appealing:

Support with housework and childcare: 39.6% Reduction of financial burden: 35.5% Peace of mind in emergencies: 35.0%

・Top 3 reasons those living separately find cohabitation appealing:

Peace of mind in emergencies: 31.0% Easy interaction with parents: 28.1% Ability to show filial piety: 28.1%

・Ideal layout type if building a two-generation home:

Fully cohabiting type: 41.8% Fully separated type: 56.8%

・Top 3 concerns about two-generation homes among those living with parents:

Differences in lifestyle rhythms: 23.4% Difficulty inviting friends over: 21.8% Interference in parenting style: 18.8%

・Top 3 concerns about two-generation homes among those living separately:

Differences in lifestyle rhythms: 39.4% Noise and differences in daily schedules: 20.7% Burden of illness or caregiving: 20.2%

Detailed Survey Results

Q1. From the child's perspective, what is your relationship with your parents? (SA) *Excludes in-laws

Q2. Future intentions of those currently living separately from parents (biological or in-laws)

Q3. Satisfaction with two-generation cohabitation? (SA) *Asked of 197 respondents currently living with parents

Q4. Reasons for finding cohabitation with parents appealing (MA) N=197

*Asked of those currently living with parents

Q5. Reasons for finding cohabitation with parents appealing (MA) N=203

*Asked of those currently living separately from parents

Q6. Ideal floor plan type if building a two-generation home? (SA)

Q7. Concerns or worries about two-generation homes (MA) N=197

*Asked of those currently living with parents

Q8. Concerns or worries about living in a two-generation home (MA) N=203

*Asked of those currently living separately from parents

● Overview of the Survey

・Valid responses: 400

・Target group: Married men and women aged 20s–40s = 200 men, 200 women

・Survey period: February 16–22, 2026

・Survey region: Nationwide

・Survey method: Web-based survey

・Survey company: Marketing Research Service Co., Ltd.

◆ Company Overview

・Company name: LIXIL Housing Research Institute, Inc.

・Representative: President and CEO, Nobuhiko Kashima

・Head office: 1-1-1 Nishishinagawa, Shinagawa-ku, Tokyo 141-0033

・URL: [LIXIL Housing Research Institute] https://www.lixil-jk.co.jp/

As part of LIXIL, which operates comprehensive housing and building materials, equipment manufacturing, and housing franchise businesses, the company manages housing franchise operations. It operates three brands: Aiful Home, Fias Home, and GL Home, forming one of Japan’s largest housing franchise networks. Since 2024, it has launched 'YUIE' (new construction voluntary chain) and 'DUUO' (single-family renovation voluntary chain) to support builders and construction firms nationwide.