Without being too extravagant you can get by with 5000 to 10000 yen per day on lunch and dinner including transportation/subway/rail. That's about $50.00 to $100.00 in American dollars (minimizing taxi usage). Try to avoid the taxi's because that could cost a small fortune, especially in rush hour.
The popular referendum is a device which allows voters to approve or repeal an act of the Legislature. If the Legislature passes a law that voters do not approve of, they may gather signatures to demand a popular vote on the law.
So Senate Leader Harry Reid cut a deal with Pelosi: the House would pass the Senate bill without any changes if the Senate agreed to pass a separate bill by the House that made changes to the Senate version of Obamacare. This second bill was called the Reconciliation Act of 2010. So the House passed PPACA, the Senate bill, as well as their Reconciliation Act. At this point PPACA was ready for the President to sign, but the Senate still needed to pass the Reconciliation Act from the House.