It appears to be a radio transmission from a ham radio operator (JP2XYT) in Japan. Here's a breakdown of the message:

* "07:54" is the time of the transmission.

* "JP2XYT/P" is the call sign of the transmitting station, with the "/P" indicating that it's being transmitted using a portable antenna.

* "on JP-1479(Daibutsuyama Prefectural Park, JP-ME)" indicates the location of the transmitter. In amateur radio jargon, a "JP-" prefix refers to Japan, and "ME" is likely referring to the Meiji region in Honshu, Japan's largest island.

* "7041 FT8" is the operating frequency (7041 kHz) and mode (FT8, a digital mode) of the transmission.

* "TNX" is an abbreviation for "thank you," indicating that the operator is acknowledging receipt of a signal or transmission from another station.

* "ACT!" likely stands for "Activity," indicating that the operator is taking action to respond or acknowledge the transmission.

* "[JG7MRR]" is the call sign of the receiving station, which is probably located outside Japan (the prefix "J" and suffix "R" suggest a US-based amateur radio operator).

In summary, JP2XYT/P is transmitting on 7041 kHz in FT8 mode from Daibutsuyama Prefectural Park in Japan, acknowledging a transmission from JG7MRR.