Approximately how many gadgets are in Doraemon's fourth-dimensional pocket?

Haha, this question is practically one of the "ultimate mysteries" in the Doraemon fandom! Every time I see Doraemon frantically rummaging through his pocket, I wonder just how many treasures are crammed in there.

Actually, there's no single, absolute official answer regarding the exact number of gadgets. But we can understand it better by looking at it from a few different angles.

Angle 1: Officially Counted, But an "Incomplete" Number

Some official or semi-official Japanese publications and TV stations (like TV Asahi) have conducted counts. These counts tally every gadget that has appeared in the manga or anime.

One well-known figure is 1,963. This number is interesting because Fujiko F. Fujio began serializing Doraemon in 1969 (though the number doesn't match the year, this figure is widely circulated and holds a kind of commemorative meaning).
Other counts suggest over 2,000, or even more, as new anime episodes and movies keep adding new gadgets.

But! This is only the number we've seen. It's like asking how many things you own and only counting what you used today – it's definitely incomplete!

Angle 2: From a "Sci-Fi Setting" Perspective, the Number Could Be Astounding

This is the core of the question! Doraemon's pocket is officially called the Fourth-Dimensional Pocket (Yojigen Pocket / 四次元ポケット).

You can think of it as a wormhole.

The pocket itself isn't a storage unit; it connects to a massive Fourth-Dimensional Storage Warehouse located at Doraemon's home in the 22nd century.
Doraemon usually keeps commonly used gadgets and spares in his pocket for easy access.
Gadgets he rarely uses, or those that are exceptionally large (like the "What-If Phone Booth"), are stored in that main warehouse.
We also see in the stories that Doraemon has spare pockets, and the pockets themselves need regular cleaning, maintenance, and organizing. If things are thrown in haphazardly, even he can't find anything (a scenario we're all too familiar with, haha!).

Therefore, based on the setting:

The number of gadgets "routinely carried" in the pocket might be in the hundreds or thousands, but the total number of gadgets in the massive warehouse it connects to is theoretically extremely vast, practically uncountable. As long as the future world's gadget factories keep producing, he can restock anytime.

To Summarize

So, if someone asks you this question, you can answer like this to sound like a true expert:

If counting only gadgets that have appeared: Around 2,000, a figure supported by documented counts.
If considering the pocket's principle: The number is virtually infinite! Because the pocket is just an entrance connected to a massive futuristic warehouse.

Put simply, how many gadgets are in that pocket depends entirely on the needs of the story. Whatever the author needs, Doraemon can pull it out. That's the most magical and fascinating thing about this pocket, right?