<Relationship Chart,Degree of Kinship>


This Family Relationship Chart depends on a rule of the Japanese civil law
            Collateral relatives             Lineal descendant   Collateral relatives 
 ┌──────────────────────────────┐┌───────────┐┌────────┐ 
┌                                                       ┐
│ Relatives:Blood relationship of 6 degree relatives in, 4th Great-┏━┓   Grand/Great?         │
│       Spouse,                  Grandparents┃6┃     Grand-Uncle/Aunt     │
│       Relative by marriage in the 3rd degree.        ┗┯┛     Great-Uncle/Aunt     │
│           ┏━┓┌─┐                  │      Grand-Nephew/Niece    │
│ Blood relationship:┃ ┃│ │:Relatives by marriage,      │      Great-Nephew/Niece    │
│           ┗━┛└─┘ in-laws(affinity)   3rd Great-┏┷┓     Grand:genealogical terms │
│   Number in the square:the Degree of Kinship    Grandparents┃5┃        the same as great  │
│          ①~③:Spouse(relatives-in-law)        ┗┯┛                  │
│   ┌───────────────────────────────┤                   │
│   │                               │                   │
│  ┏┷┓2nd Great-Grand-                2nd Great-┏┷┓                  │
│  ┃6┃Uncle/Aunt                   Grandparents┃4┃                  │
   ┗━┛                             ┗┯┛                  │
Ancestor┌───────────────────────────────┤                   │
    │                               │                   │
│  ┏┷┓Great-Grand-                    Great-┏┷┓   ┌─┐Great-         │
│  ┃5┃Uncle/Aunt                   Grandparents┃3┃   │3│Grandparents      │
│  ┗┯┛                             ┗┯┛   └┬┘-in-law         │
│   │       ┌───────────────────────┤     │             │
│   │       │                       │     │             │
│  ┏┷┓  Grand-┏┷┓                     ┏┷┓   ┌┴┐            │
│  ┃6┃Uncle/Aunt┃4┃               Grandparents┃2┃   │2│Grandparents      │
│  ┗━┛     ┗┯┛                     ┗┯┛   └┬┘-in-law         │
│ 1st Cousin     │       ┌───────────────┤     ├──────────┐  │
│ twice removed    │       │               │     │    Uncle/Aunt │  │
│          ┏┷┓     ┏┷┓ ┌─┐         ┏┷┓   ┌┴┐    -in-law ┌┴┐ │
│     1st Cousin┃5┃Uncle/Aunt┃3┠─┤③│      Parents┃1┃   │1│Parents     │3│ │
└    once removed┗┯┛     ┗┯┛ └─┘         ┗┯┛   └┬┘-in-law     └─┘ │
            │       │      ┌────────┤     ├──────────┐  
            │       │       │      ┏━┷━┓ ┌─┴─┐        │  │
           ┏┷┓     ┏┷┓ Sibling┏┷┓ ┌─┐ ┃   ┃ │   │       ┌┴┐ │
       2nd Cousin┃6┃1st Cousin┃4┃ Brother┃2┠─┤②│ ┃ Self ┠┬┤Spouse│Brother/Sister│2│ │
           ┗━┛     ┗┯┛ /Sister┗┯┛ └─┘ ┃   ┃││   │   -in-law └┬┘ │
                    │      │      ┗━━━┛│└─┬─┘        │  │
                    │      │           │  (*1)          │  │
│                  ┏┷┓    ┏┷┓ ┌─┐     ┏┷┓ ┌─┐       ┌┴┐ │
│              1st Cousin┃5┃ Nephew┃3┠─┤③│   Child┃1┠─┤①│ Nephew/Niece│3│ │
│            once removed┗┯┛ /Niece┗┯┛ └─┘   Son/┗┯┛ └─┘   -in-law └─┘ │
│                   │      │      Daughter │                │
│                   │      │           │                │
│                  ┏┷┓ Grand-┏┷┓         ┏┷┓ ┌─┐           │
│             1st Cousin┃6┃ Nephew┃4┃    Grandchild┃2┠─┤②│           │
│            twice removed┗━┛ /Niece┗┯┛         ┗┯┛ └─┘           │
│                          │           │                │
│                          │           │                │
│                   Great-Grand-┏┷┓      Great-┏┷┓ ┌─┐           │
│                   Nephew/Niece┃5┃    Grandchild┃3┠─┤③│           │
│                         ┗┯┛         ┗┯┛ └─┘           │
                           │           │                │
Descendant                      │           │                │
                  2nd Great-Grand-┏┷┓    2nd Great-┏┷┓               │
│                   Nephew/Niece┃6┃    Grandchild┃4┃               │
│                         ┗━┛         ┗┯┛               │
│ Relationship Terms in English Language                  │   (*1)            │
│ cousin relationship(the generations trace back to siblings)        │  ┌┴┐           │
│   Nth Cousin R times removed                3rd Great-┏┷┓ │1│Stepchild       │
│   ordinal number = degrees of collaterality        Grandchild┃5┃ └┬┘           │
│   R times removed = generation difference               ┗┯┛ ┌┴┐           │
│ in-law relationship(relative-in-law)                   │  │2│StepGrandchild    │
│   relative by marriage and blood relatives of the spouse        │  └┬┘           │
│ half/step relationship(apply when parent remarry)       4th Great-┏┷┓ ┌┴┐           │
│   half siblings have one parent in common but not both   Grandchild┃6┃ │3│StepGreatGrandchild  │
│   stepsiblings have no parents in common               ┗━┛ └─┘           │
└                                                       ┘
 └──────────────────────────────┘└───────────┘└────────┘ 
            Collateral relatives             Lineal descendant   Collateral relatives 
There are both relations of the father's side and the mother's side to all the ancestors.