To elaborate on what Stuart here said
Thanks for the elaboration. It's late and my minds a bit of a mess so I didn't include all the details I could have hehe. Just the basics that I could type off without even thinking about it.
1. I think I'm on chapter 7. I'mlooking for Sakura, whom I think Kimiken kidnapped.
Does bandai namco ever do direct sequels though? Aside from the titles and some shared characters, it seems to me that digimon games have little to do with each other.
The next place I can recommend would be the Asakusa Digital Shift (where it looks all data like. Like in the Shinjuku Subway earlier on). Don't go past the DigiLab access point and you can just grind away in there for a bit. (the one half way into the area iirc).
And while I would love a direct sequel to this, it doesn't really need to be a direct sequel, just a Digimon Story title with the same style of gameplay/systems we have in this.
Though Digimon World: Next Order feels like a direct sequel (based on the marketing so far) of Digimon World 1. It remixes some of the music from DW1 (such as File City Day and Night time music) and it even includes the protagonist (though they just call him mysterious guy or something but he's got the same design, he just looks older in his art work, see below). Now if it's a direct sequel or not is to be determined since the game isn't out yet until March in Japan.
DW1 protag in Next order:
And this is him in Digimon World 1: