The list is now a spreadsheet), I am going to add links to the games, and specify the genre, if it's anime or not, and specify the precence of sexual content.
Also, I should move all my lists as Google Sheets and link them to a new page.
https://docs.google.com/spreadsheets/d/1jeOCKd5fxJahJ_mOQ6PuqfK-jH8jETGDpW_hQNZcnzw/edit?usp=sharing

other lists
Russian dub
https://www.gog.com/forum/general/games_with_russian_dub

German dub
https://www.gog.com/forum/general/games_with_russian_dub_1
(I know, the url says Russian)

ee saves anywhere anytime
https://docs.google.com/spreadsheets/d/1QIIf1LLzagso8jp7mI5NHnfZ24t9HZicbtEnyWKoefs/edit#gid=0

Trails of Cold Steel I & II, as well as Ys: Memories of Celceta received updates that added Japanese voices.

AKIBA'S TRIP: Undead and Undressed also has Japanese voices.

Astebreed Definitive Edition
Tokyo Xanadu eX+

Agarest: Generations of War
Agarest: Generations of War Zero
Agarest: Generations of War 2
Akiba's Trip: Undead & Undressed
Corpse Party: Blood Drive
Corpse Party: Sweet Sachiko's Hysteric Birthday Bash
Corpse Party 2: Dead Patient
Hyperdimension Neptunia Re;Birth1
Hyperdimension Neptunia Re;Birth2 Sisters Generation
Hyperdimension Neptunia Re;Birth 3 V Generation
Kindred Spirits on the Roof
The Legend of Heroes: Trails in the Sky *
The Legend of Heroes: Trails in the Sky SC *
The Legend of Heroes: Trails in the Sky the 3rd *
(* These need a mod and voice data from the PSP version of the game)
Mary Skelter: Nightmares
Megadimension Neptunia VIIR
Way of the Samurai 3 #
Way of the Samurai 4 #
(# no longer available on GOG)

thanks y'all!

Sorry for the necro, but I feel like those titles fit this thread:
Moero Chronicle
Mary Skelter 2

Moero Chronicle only has Japanese dub, and Mary Skelter 2 has the option to switch between English and Japanese dubs.

edit: probably other IF titles have Japanese dub too, but I can't check them right now.

are these where female characters squeaking?

MISTOVER
https://www.gog.com/game/mistover

All 4 Sekai Project titles released today have Japanese dub listed in their store pages:

• Kimagure Temptation
• Re;Lord 1 ~The witch of Herfort and stuffed animals
• Re;Lord 2 ~The witch of Cologne and black cat
• The Seventh Sign -Mr.Sister

According to the store page, Kurokamisama's Feast, as well as its demo

https://www.gog.com/game/kurokamisamas_feast
https://www.gog.com/game/kurokamisamas_feast_demo

Shenmue 3

Source: I got it on GOG....

Shenmue 1+2 Remaster should have them included too.

Edge of Eternity just got a Japanese translation including voiceovers. The dev doesn't put patch notes here, but we have v1.2.1 on GOG.

https://store.steampowered.com/news/app/269190/view/3122680840855893262

(I'm still waiting for the game to be complete before I play it more. I'm going to start over and throw away my ~7 hours I already played before their "roadmap" showed tons of sweeping changes were forthcoming. One of their earlier patches was a total revamp of the game start.)