Texas Instruments Japanese guidebook included CX II [2 types, 127p, 21p] TI-Nspire [Regular importer] [Warranty included]

It has functions for numerical calculations, graphs (functions, mediated representations, polar equations, sequences, differential equations, 3D), geometry, spreadsheets, statistics, and data collection, and can save them as documents. You can also do financial calculations and programming. Computer software TI-Nspire CX Student Software is included as an accessory.