I don't think that's accurate to the current market. Ten years ago it was true but in 2025 they have several competitors and not nearly as many exclusives. I can name several counterarguments.
* Shonen anime, which are consistently the most popular ones, are also on netflix and probably several other services. Eg, demon slayer, dandadan, etc.
* there are still shows that are japan-exclusive because nobody bothers to license them. Roboshinkalion is an entire franchise that nobody cares to import! We actually had to wait two extra years for gridman universe because nobody bothered to license it for English localization!
* just this year they failed to obtain the rights to Mobile Suit Gundam G-Quuuuuux and Panty and Stocking With Garterbelt because amazon outbid them. These are both new entries in well-established brands and they're both made by studios with large fan followings (khara for g-quuuuuux and trigger for panty and stocking).
* somehow Hulu ended up breaking harmony gold's 45-year blockade around the macross franchise and won exclusive streaming rights.
* netflix has a lot of exclusives these days, including Jojo stone ocean and the upcoming steelball run.
* Shonen anime, which are consistently the most popular ones, are also on netflix and probably several other services. Eg, demon slayer, dandadan, etc.
* there are still shows that are japan-exclusive because nobody bothers to license them. Roboshinkalion is an entire franchise that nobody cares to import! We actually had to wait two extra years for gridman universe because nobody bothered to license it for English localization!
* just this year they failed to obtain the rights to Mobile Suit Gundam G-Quuuuuux and Panty and Stocking With Garterbelt because amazon outbid them. These are both new entries in well-established brands and they're both made by studios with large fan followings (khara for g-quuuuuux and trigger for panty and stocking).
* somehow Hulu ended up breaking harmony gold's 45-year blockade around the macross franchise and won exclusive streaming rights.
* netflix has a lot of exclusives these days, including Jojo stone ocean and the upcoming steelball run.