Finally I got a cell phone.
I had used a line phone in the dorm and I was using my boyfriend's cell phone after moving out. So I am pretty happy! I had a contract at a cell phone shop a few days ago, however, I cancelled it because they gave me a free cell phone which was big, outdated and looked like a cell of 50 years ago. Then, I went to a different shop and got a free cell phone and this has camera, flip, color screen... It was much better than the other one. 
I think the most common cell phone plan is 1000 mins call and free weekends and free after 9pm on weekdays for $39.99. Sending text message is more expensive and calling is much cheaper compared with Japanese common plans. Another difference is that not only a caller but also a receiver will be charged. Well, either way, it is hard to call beyond 1000mins per month.
I had used a line phone in the dorm and I was using my boyfriend's cell phone after moving out. So I am pretty happy! I had a contract at a cell phone shop a few days ago, however, I cancelled it because they gave me a free cell phone which was big, outdated and looked like a cell of 50 years ago. Then, I went to a different shop and got a free cell phone and this has camera, flip, color screen... It was much better than the other one. I think the most common cell phone plan is 1000 mins call and free weekends and free after 9pm on weekdays for $39.99. Sending text message is more expensive and calling is much cheaper compared with Japanese common plans. Another difference is that not only a caller but also a receiver will be charged. Well, either way, it is hard to call beyond 1000mins per month.