A radio transmission in JT65 mode (FT8), specifically a report from the Japanese amateur radio station JS2FLW to another station on frequency JP-0021. Here's a breakdown of what it means:

* **08:45**: The time the message was sent.

* **JS2FLW**: The callsign of the transmitting station, which is an amateur radio station located in Japan (the "JP" prefix indicates country code).

* **on JP-0021**: The frequency being used for this transmission, specifically a JT65 (now FT8) mode band segment designated as JP-0021. In amateur radio, frequencies are often grouped into bands or segments with unique identifiers.

* **Yoshino-Kumano National Park, JP-ME,JP-NR,JP-WK**: This is the location of the transmitting station JS2FLW. The "ME" prefix likely indicates a specific geographic area within Japan (e.g., Mie Prefecture). "NR" and "WK" might be additional identifiers for specific areas or zones.

* **7042 FT8 ft8[JS2FLW]**: This part of the message is a report of signal strength, but it seems to have been cut off. The numbers likely indicate the received signal strength in decibels relative to one milliwatt (dBm), with "ft8" being an abbreviation for the digital mode used (FT8). The "[JS2FLW]" at the end is the transmitting station's callsign, repeated as a confirmation or identification.

Keep in mind that amateur radio communications are often coded and use specific terminology. This explanation aims to provide a general understanding of the content, but may not cover all nuances specific to this transmission.