Internet services in Japan: Useful links

One of the advantages of living in a share-house or guest-house is that you can save a lot of  money on the initial costs of facilities, that is, what you usually pay when you move to a new place. If you rent a private apartment, in addition to rent you may pay for a new bed, blanket, pillow, table and chairs, TV, refrigerator, microwave, toaster, washing machine, curtains. In addition, you may want to use Internet in your room so you have to pay the initial costs and monthly fees for using the Internet. in a Shared Apartment or guest houses unlike a private apartment, you share facilities in common areas including the Internet equipments. 

This represents  one advantage of sharing a house.
 
There some useful tips and links, where you can find information about Internet services in Japan. 
Networks available in Japan:

ADSL:

ADSL is high-speed Internet that uses a fixed telephone line that you can have installed quickly and economically.
Cable Television Line (CATV):

By using Cable TV, you may be able to use the same line to connect to the Internet. Please check with the cable company to see if the area in which you live has Internet via CATV capability.
Fiber to the Home (FTTH):

Optical fiber transfers data at the rate of 10Mbps to 100Mbps so it is extremely fast. Sometimes, this service is limited in certain areas. Line construction work is necessary, so if you live in an apartment, you will need to get per...