On Tuesday, Bangkok's Central Juvenile Court awarded Shigeta, 28, custody of 13 babies he fathered via surrogacy.
The Bangkok Central Juvenile and Family Court chose to return the children to Shigeta as the sole parent, "ruling that he is financially stable and had showed his plans to care for them", according to the Washington Post.
The court case was launched in 2014 after Bangkok Interpol agents discovered nine babies living with nine nannies and little else in a luxury condominium. A court in Bangkok ruled that Mitsutoki Shigeta had a large enough income to raise all of the children.
The case helped usher in a ban on commercial surrogacy for foreign clients.
The Japanese man was given custody of the 13 children on Tuesday, largely due to his financial and professional stability, and he was found to have no links to human trafficking, the court statement said.
It was also noted that though he was away from the babies after the scandal broke, his representatives had regularly visited the children at the facilities and had also opened trust fund accounts for the 13 children in Singapore.
Shigeta hired the Thai surrogates before the ban on foreigners.
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"Therefore, it is ruled that all the 13 children are legal children of the petitioner. and the petitioner is their sole guardian". However the court found the father had no history of bad behaviour and he would provide for the children's happiness.
Japanese tabloids reported in 2014 that Shigeta said he wanted to produce 100 to 1,000 children and that if he were successful it would cost millions of dollars.
Thai authorities investigated Shigeta for human trafficking and child exploitation, but filed no charges. Thai officials took the children into care in 2014 after the exposure of an extensive commercial surrogacy business.
Shigeta, son of billionaire businessman Yasumitsu Shigeta, said through his lawyers that he simply wanted a big family, the AP reported.
When the babies were found in 2014, investigators discovered a number of unregulated surrogacy businesses in the country. When asked why the man would want so many children at the same time, Mr Kong said: "He has personal and business reasons". The children that he cared for in Japan now all have Japanese citizenship, it said.
The man had his sperm fertilise donor eggs, which were then planted in the wombs of the surrogate mothers in 2013, according to a press statement given by the court.
After Thailand clamped down on the trade the following year, surrogacy agencies quickly migrated to neighbouring Cambodia, which followed suit and barred the industry in 2016.