Tokyo Magnitude 8.0 reach her own daughter and mother in Sangenjaya. Together, the three of them brave the partly ruined city and try their best to make it home safely. The series was first announced at the 2009 Tokyo Anime Fair, denoting that it would replace "Eden of the East" in Fuji TV's noitamina well-rated anime timeblock and would be co-produced by Bones and Kinema Citrus. The series' setting is based upon the prediction that there is 70% or higher chance of an earthquake measuring 7.0 magnitude on the Richter scale hitting Tokyo in the next 30 years, with the series illustrating the
Rating scale at the ordinal level. Numbers indicate the relative position of items, but not the magnitude of difference. Attitude and opinion scales are usually ordinal; one example is a Likert response scale: Some data are measured at the interval level. Numbers indicate the magnitude of difference between items, but there is no absolute zero point. A good example is a Fahrenheit/Celsius temperature scale where the differences between numbers matter, but placement of zero does not. Some data are measured at the ratio level. Numbers indicate magnitude of difference and there is a fixed zero point. Ratios can be calculated. Examples include