Chat app Between has nabbed an undisclosed amount of investment from Japan-based gaming platform and web services provider DeNa. Between was created by South Korean firm VCNC, according to Tech In Asia.

Between a private digital space made exclusively for couples to keep in touch, chat, and share moments, the report said.

The South Korean company will use the new capital to help Between become an open platform. According to VCNC Singapore general manager Joash Wee, this would involve in-app purchases of material and digital products from partners that cater couples. This feature will be released in South Korea first. Up until now, Between has earned revenue mainly through the sale of digital stickers, the report detailed.

By the end of 2013, Between had achieved five million downloads. The app's biggest market is South Korea, with 60% of its registered users coming from there. Japan, on the other hand, takes the second place. The Version 2.0 of the app last year prompted a double increase in Between's daily user acquisition, the report explained.

Prior to the latest financing, VCNC had closed $3 million from strategic investors including Softbank Ventures Korea and KTB Network, Tech In Asia reported.