Leseee... there are quire a few more begats between Youshou and Tenchi's
mother.

Nobuyuki's mother is also Youshou's daugher, through a different branching.

                                    Funaho(F)     Mazusa(M)         Misaki?(F)
                                       |____________|  |________________|
                                             |            |          |
                               ?????(F)   Yo:sho:(M)    Aeka(F)   Sasami(F)
                                  |___________|
   ??????(F) Yo:sho(M)                  |
      |__________|                      |
           |                            ~
        ??????(F)  ???????(M)           |
           |__________|                 ~
                 |                      |
              Nobuyuki(M)            ?????(F)
                   |____________________|
                              |
                          Tenchi(M)

Okay... so it's a mess :)

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