Kaminoyonanayo (神世七代) (神世七代)

Kaminoyonanayo is a general term for seven generations of deities who were born when heaven and earth were created in Japanese Mythology. Or it refers to such an era. It is also described as 神代七代 in Japanese and is also called Tenjin Shichidai.

The way abstract deities are gradually divided into a man and a woman, become aware of the opposite sex and eventually find love which leads to marriage is said to imply how the bodies and sexes of a man and a woman are properly differentiated.

Kojiki (The Records of Ancient Matters)
In Kojiki, Kaminoyonanayo are Junihashira nanayo no kami (Twelve deities of seven generations) who appeared after Kotoamatsukami (Literally, Separate heavenly kami). There is one deity in each of the first two generations, and there are two deities in each of the third or later generations, and so the total number of generations becomes seven.

Kunitokotachi no Kami
Toyokumonu (Also known as Toyogumonu no Kami)
Uhijini・Suhijini (Uhijini no kami)・Suhijini no Kami
Tsunugui・Ikugui (Tsunugui no kami)・Ikugui no Kami
Otonoji・Otonobe (Otonoji no kami)・Otonobe no kami
Omodaru・Ayakashikone (Omodaru no kami)・Ayakashikone no kami
Izanagi (Izanagi no kami)・Izanami (Izanami no kami)

(Male deities are on the left while female deities are on the right.)

Nihonshoki (Chronicles of Japan)
In Nihonshoki, Kaminoyonanayo are Juichihashira nanayo no kami (Eleven deities of seven generations) who appeared at the beginning of creation of heaven and earth:

Kuninotokotachi no mikoto
Kuninosatsuchi no mikoto
Toyokumunu no mikoto
Uijini no mikoto・Suijini no mikoto
Otonoji no mikoto・Otomabe no mikoto
Omodaru no mikoto・Kashikone no mikoto
Izanagi no mikoto・Izanami no mikoto

Hitori-gami

A deity whose name is marked with a dot (•) is different from the other deity or deities in the same generation group, but they are conveniently categorized into the same group.