Emulator

Game Name?

Chindōchō!! Pole no Daibōken
(btw actual title is "Chindōchū", not "Chindōchō")

Game ID? (right click the game in the game list, Properties, Info tab)

WPDJ8P

MD5 Hash? (right click the game in the game list, Properties, Verify tab, Verify Integrity button)
e9f12ae928a49f65bbe1e16c0ee48698

What's the problem? Describe what went wrong.

in middle of stage 3-3 (A place that many enemies appears on screen),The game lags.
this lag doesn't happen on real hardware.
(I tried in default setting.)

What steps will reproduce the problem?
Start stage, and reach middle of stage 3-3.

Is the issue present in the latest development version? For future reference, please also write down the version number of the latest development version.

Yes. (5.0-15193)

Is the issue present in the latest stable version?

[Yes/No and version number here]
Yes.(5.0)

What are your PC specifications? (CPU, GPU, Operating System, more)

[PC specs here]
Windows 10 Home 64bit 10.0 Build 19043
Intel Core i-5850 CPU
16GB RAM
DirectX 12
NVIDIA GeForce GTX 1050 Ti

Is there anything else that can help developers narrow down the issue? (e.g. logs, screenshots,
configuration files, savefiles, savestates)
I have savestate files but I can't send because filesize is too big.
https://www.youtube.com/watch?v=UpcNwQ06aBc (Emulator 5.0-15193)
https://youtu.be/ZtzKQmcAY4g?t=511(Real Hardware)