| Informant | Hikikomori case | Interview sessions | ||||||||
|
| Age | Gender | Relationship | Age | Gender | Ethnicity | Status | Location | Year | |
| A | 24 | Woman | Cousin | 27 | Woman | Chinese | Current | China | 8 | Face-to-face/3× |
| B | 38 | Man | Sister | 35 | Woman | Korean | Current | Korea | 2 | Face-to-face/2× |
| C | 33 | Man | Self | 33 | Man | Japanese | Previous | Japan | 8 | Email/6× |
| D | 28 | Man | Self | 28 | Man | Japanese | Current | Japan | 8 | Skype chat/2× Phone call/1× |
| E | 24 | Man | Self | 24 | Man | Caucasian | Current | Austria | 2 | Skype chat/12× |
| F | 24 | Man | Sister | 21 | Woman | Japanese | Current | Japan | 19 | MSN chat/4× Email/2× |
| G | 24 | Man | Self | 24 | Man | Japanese | Current | Japan | 4 | Email/3× |
| H | 38 | Woman | Self | 38 | Woman | Japanese | Current | Japan | 20 | Skype chat/12× |