I have a japanese friend who is doing a graduate thesis on japanese design aesthetics, specifically as they relate to temples and shrines. I remember there was a similar thread on this forum a year or 2 ago picking apart the rakuten websites and similar design ideas, so i mentioned it to her and i think her reply was pretty interesting. specifically she was talking about the ごちゃごちゃ (messy/jumbled-up chaotic) aesthetic, and how this has been present in japanese design going back centuries.
looking at old shinto shrines, you would have a shrine for a cow over here, and a tree with hanging paper thingies of there, and if someone with some money wanted to make a donation they would just find a space for whatever the hell he felt like buying. well this goes on for a while and you have a space that begins to look kinda crazy. and you could say the same for some Buddhist temples that get crowded with stuff everywhere inside too.
She then connected that to the lack of overall urban planning in japan. you can pretty much put a skyscraper in the middle of a row of tiny shops. there might be a small shrine somewhere in there too. oh and maybe a uniqlo. my western friends think this makes the japanese cities look crazy but if you look carefully this isn't an accident. it really runs throughout the country to a large extent.
You could also say it is partly related to the 使い捨て(use and throw away) mentality of most japanese people. buildings there generally get demolished after 20 years of use, so what is the point of planning if buildings have such a turnover. well you extrapolate from that idea and you just have this continual chaotic accumulation that becomes an overriding principle, an aesthetic end as opposed to a means.
(here's a nice podcast talking about the 使い捨て approach to buildings and the strangeness that brings to real estate in japan generally:
http://freakonomics.com/2014/02/27/why-a...podcast-3/ )
and then you take all of that and fast-forward to today, and you get shinjuku biklo (BIC camera & Uniqlo in one store). in their advertising they actually use the phrase 素晴らしくゴッチャゴッチャ (splendidly jumbled and chaotic). and that themesong is always running in the background making you feel as hyper and crazy as the space you're in.
I once had the misfortune of being stuck in biklo for an hour, and was getting really exhausted/freaked out by it all... I asked one of the workers if they go crazy from the over-stimulus, or what's it like being in a place like that 8 hours a day 5 days a week. She said that after the first week you don't hear the music or see the flashing lights... your body just learns to block it all out.
An alternate theory might simply be that these desensitized people are the ones designing all the websites...
Edited: 2014-11-16, 1:06 pm