Question for TOKYO FAMILY COURT (TOKYO KATEI SAIBANSHO)

Good day can I ask some information if I don't have enough money to pay for attorney what should I do? I gave birth last April 7 the same father of my second child and 3rd child but he didn't recognize my latest baby . We're not Married but my 2nd son he enter his family register but nlour 2nd baby he didn't put in his family register. Then he escape for his responsibility I'm a Filipino living in saitama.
How can I file a case against a the father of my son but my problem is I don't have enough money to settle the payment for my attorney . That's why I can't file a case against the father of my sons