Well, I’m not an expert on Japan, but I have been here a while, so…
First off, Banana Yoshimoto is known for taking ordinary settings and filling them with bizarre characters and situations, so I’d be very careful about basing your image of Japanese culture on her books. It’s kind of like imagining that the US is just as David Lynch portrays it in his movies.
Love suicides. During the Shogun era (pre-1860), love suicides happened (for the reasons Zog explained) but were probably not that common. Today, however, they are almost non-existant. Japanese society became a lot more egalitarian after WWII, so there is less concern about a potential spouse’s background among ordinary families. Who one marries has become much more of an individual choice, rather than a parental command. Granted, arranged marriages are still fairly common (about 30-40%), but they are “arranged” in the sense of introducing a pair of prospective singles and seeing if they hit it off.
It’s still customary for the groom-to-be to ask his future in-laws for permission to marry their daughter (I did this myself). Most of the time, it’s just a formality. If the parents reject the marriage, though, the unlucky couple does not start thinking about suicide. In modern Japanese society, a love suicide would never be considered an acceptable, rational, or even understandable choice. Family ties are still quite strong in Japan, but not so strong that being away from your family is a fate worse than death. If the couple loves each other enough to prefer death to separation, then they will most likely just move to Tokyo, get married anyway (parental permission isn’t legally required if they’re both over 18), and wait for the parents to accept the situation (which usually happens when the grandkids are born). If a couple did decide to commit suicide together because the parents had refused to accept their marriage, it would definitely make the national news.
Cocktails. I’ve seen ‘cocktail’ applied to a few non-alcoholic drinks (and foods, there are a few varieties of cocktail-flavored gum here), but it’s almost always used for alcoholic beverages.
The drinking age is 20, but there isn’t any strict carding policy at stores or bars. Still, a 10-year-old would never be served alcohol at a restaurant, store or bar. Socially, the Japanese tend to view underage drinking about as disapprovingly as Americans do (many Japanese I’ve spoken with were very surprised that my family let me drink wine occasionally at dinner ever since I was little (I have a French father)). Drinking in front of your kids (at home or in a restaurant), however, is considered normal, but I think either the book’s character was jokingly referring to a child’s (non-alcoholic) drink as a ‘cocktail’, or Yoshimoto was deliberately trying to be shocking. So no, it is definitely not considered normal or socially acceptable to get a 10-year-old drunk.
Hope this helps!
Disclaimer: I’ve read Yoshimoto’s Kitchen. My mom and my (Japanese) fiancee have also read it. None of us got the point.
–sublight.