"We take stuff for him like clothes and books,but they are often refused. There is no privacy,even for the toilet."
Mr McIntyre wassacked as a sports reporter by SBS in 2015 after he published tweets about Anzac Day which were deemed"inappropriate"and"disrespectful"by then SBS boss Michael Ebeid and then communications minister Malcolm Turnbull.
He commenced unfair dismissal proceedings against SBS andthe parties settled in 2016.
Japan is one of the few developed nations in the world that does not recognise joint custody upon separation. Even if a court order does provide for shared custody,visitation rights are routinely ignored.
There are no official figures,but it's thought up to 20 children every year are snatched from Australia and taken to Japan without the consent of one parent.
"Worldwide,the figure is closer to 1150,"said child recovery expert Colin Chapman.
"Japanese law makes it very hard to get those children back,which is why Japan has become known as a black hole for child abduction."
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Japan is a signatory to the Hague Convention on the Civil Aspects of International Child Abduction,which provides a legal process through which a parent can seek to have their child returned to their home country.
But Japan has been widely criticised for non-compliance. In any case,the convention only applies to international abductions. It is of no help to Mr McIntyre,whose children were abducted within Japan.
Embassy officials have visited Mr McIntyre in detention. It's expected he will face court in January. Prime Minister Scott Morrison will also be in Japan in January,to discuss a defence cooperation agreement.
"While he's there we'd like the Prime Minister to raise this issue of child abduction with the Japanese government,"Mr McIntyre's father Laurie said.
"Scott's not the only person this has happened to. Other Australian kids have gone missing in Japan. Someone has to do something about this."