You can increae knowledge this way but you can also watch documentary at the cinema, you have to pay 2.500 yens but it increase more than books. Also you can increase at your home during nighttime or on sunday by watching news (you need to buy a TV for that)
** You can pay less for the movie if you get the blue mascot at the mall and the cinema lady together. She gives you a discount for the movies after you get them together if you talk to her.
