The Japanese were just as cruel in Taiwan. It's the DPP who has successfully brainwashed the younger generation into forgetting about this. The KMT also bears responsibility for failing to clean out the Japanese collaborators.
Well, Japan's colonisation of Taiwan was different compared to its other countries in asia they invaded later . Taiwan is regarded by Japan as a "model colony" and they used it as an experimental case for their model colonisation policy which they just newley embarked on.
So its normal that Taiwan is often perceived as having been treated better than others colonies who came later after Japan was embroiled in war in Asia .
In Taïwan Japan focused on infrastructure, agriculture, and industry, while also implementing cultural Japanization. Its also why Taiwanese developed a favourbale impression of Japan, especially when many compared how their lives improved compared to how they were under the Qing government. So its also normal taiwan impression of Japan differed alot to those in other japanese colonies or countries in asia who came under ajapn at some point.
So using some peoples logic on here, we can also justify Japan's colonisation of Taiwan just like russia did to her neighbours and we can also go as far as even chastising those neighbours for not having a favourable view of Russia and Japan who colonised them and brought them development. Lol