<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 of 3 degree relatives in. ┗┯┛ 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
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There are both relations of the father's side and the mother's side to all the ancestors.
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