Compatible with the 'Post-Divorce Joint Custody System' starting in April 2026. Official release of the Android version of the joint custody and co-parenting app 'Copak' [Supervised by lawyers]
The Joint Custody Organization has officially released the Android version of 'Copak,' a joint custody and co-parenting support app. Developed ahead of the new legal system starting in April 2026, it aims to reduce parents' psychological burdens.
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- 📰 Published: March 31, 2026 at 19:00
- 🔍 Collected: April 1, 2026 at 13:39 (18h 39m after Published)
- 🤖 AI Analyzed: April 22, 2026 at 06:06 (496h 27m after Collected)
The Joint Custody Organization (Location: Minato-ku, Tokyo) is pleased to announce the official release of the Android version of "Copak", an app supporting joint custody and co-parenting compatible with the "post-divorce joint custody system" starting in Japan in April 2026 (the iOS version is scheduled for release in April).
App download site: https://x.gd/vO34W
"Copak" is an app designed to help divorced parents engage in peaceful and stable co-parenting with their children at the center. It is designed based on practical examples of joint custody systems overseas and developed under the supervision of a law firm.
## Background of Development
In April 2026, the "post-divorce joint custody system" will be implemented as a historic legal revision in Japan.
On the other hand, the reality is that there is a large gap between "having joint custody" and "actually being able to co-parent smoothly". There are various challenges hidden in co-parenting by divorced parents, such as the burden of adjusting parenting schedules, psychological resistance to communicating directly even after divorce, rules and role sharing regarding education and medical care.
Copak was developed to overcome these challenges using technology, aiming to provide "peaceful lives" to divorced parents and "love from both parents" to children.
## Main Features of the Copak App
### 1. Co-parenting Calendar
Easily create custody and parenting schedules using templates. A simple adjustment function centered on one-click YES/NO operations significantly reduces the psychological and administrative burden on both parents.
### 2. Child Data Bank
Centrally manage important information related to school, medical care, and child-rearing between parents. It provides a mechanism for both parents to respond quickly in an emergency, providing a safe and secure parenting environment for children.
App download site: https://x.gd/vO34W
"Copak" is an app designed to help divorced parents engage in peaceful and stable co-parenting with their children at the center. It is designed based on practical examples of joint custody systems overseas and developed under the supervision of a law firm.
## Background of Development
In April 2026, the "post-divorce joint custody system" will be implemented as a historic legal revision in Japan.
On the other hand, the reality is that there is a large gap between "having joint custody" and "actually being able to co-parent smoothly". There are various challenges hidden in co-parenting by divorced parents, such as the burden of adjusting parenting schedules, psychological resistance to communicating directly even after divorce, rules and role sharing regarding education and medical care.
Copak was developed to overcome these challenges using technology, aiming to provide "peaceful lives" to divorced parents and "love from both parents" to children.
## Main Features of the Copak App
### 1. Co-parenting Calendar
Easily create custody and parenting schedules using templates. A simple adjustment function centered on one-click YES/NO operations significantly reduces the psychological and administrative burden on both parents.
### 2. Child Data Bank
Centrally manage important information related to school, medical care, and child-rearing between parents. It provides a mechanism for both parents to respond quickly in an emergency, providing a safe and secure parenting environment for children.