It looks like you're decoding a radio transmission! Here's my breakdown of the message:

**Timestamp**: 05:04 (HH:mm) - This indicates that the transmission occurred at 5:04 in the morning.

**Call Sign**: JF1CMH/1 - This is the amateur radio operator's call sign. The "/1" likely indicates that they are operating from a temporary location (e.g., a park), rather than their primary station.

**Locator**: JP-1304(Hodogaya Prefectural Park, JP-KN) 7010.5 CW RBN - This provides additional information about the transmission:

* JP-1304: The geographic location of the transmitter, using a unique identifier (e.g., grid square).

* Hodogaya Prefectural Park: A physical location associated with the transmission.

* JP-KN: A broader region or state in Japan where the transmission is taking place.

* 7010.5 CW RBN: Technical details about the transmission:

+ 7010.5 Hz (a frequency, likely in MHz): The carrier frequency of the transmission.

+ CW: Continuous Wave (CW) mode, indicating that the operator is using a Morse code key to transmit information.

+ RBN: A reference to the Reverse Beacon Network, which allows amateur radio operators to share and receive transmission reports.

**Other metrics**: 25 dB 21 WPM - These values are likely related to the strength of the transmission (dB) and the speed at which the operator is transmitting Morse code (WPM).

Overall, this message appears to be a simple report from an amateur radio operator about their transmission status.