It appears you're sharing a log entry from an aircraft identification system. Here's what the different parts of this message might signify:

1. **"01:46"**: This suggests the time at which the observation was made, in hours and minutes (HH:MM format). In this case, it's 1 hour and 46 minutes past midnight.

2. **"JQ2DUX/2"**: This is a unique identifier for an aircraft. "JQ" typically denotes Hong Kong-based airline Cathay Pacific's codeshare partner, Jetstar Asia (before being rebranded), though in this context, it might refer to another carrier, considering the location mentioned. The "/2" usually signifies that the call sign (JQ) was altered for operational or procedural reasons, possibly due to a change in flight number, but more likely indicating an ICAO Code identifier variant rather than a codeshare. This needs clarification as the airline or its operations might have changed.

3. **"on JP-1457(Sakurabuchi Prefectural Nature Park)"**: "JP-" denotes Japan. "1457" could be either a specific flight number, but more likely refers to a unique identifier for an aircraft within Japan's flight system, akin to what is used in the USA with numbers like N12345 (though it does not start with N). The location "(Sakurabuchi Prefectural Nature Park)" seems incorrect as Sakurabushi doesn't seem directly associated with any well-known park or airport by that name. It might be a typo for another place, possibly in Japan.

4. **"7002 CW [JQ2DUX]"**: This part appears to confirm the aircraft type and its transmission mode. "7002" could refer to an HF (High Frequency) radio frequency used for communication, though this is less likely given the context of a digital log entry. The "CW" stands for Continuous Wave, indicating that the transmission was made in Morse code, which was once a standard method of sending encoded messages over radio frequencies.

5. **"[JQ2DUX]"**: This appears to be a confirmation or echo back of the aircraft's identifier from the system or another source, ensuring all parties are aware of the call sign associated with this transmission.

In summary, this message seems to contain an entry from an aircraft identification system that has logged the presence of an unidentified (or poorly identified) aircraft at Sakurabuchi Prefectural Nature Park in Japan, using a unique identifier and possibly indicating it was communicating over radio frequencies.