In 1978, the statistics explain the total number of rice Transplanters used in Japan was 1,601,000. The invention of it was on initiated in 1974. 1979, a total of 114 types, which includes 15 riding types passed for commercial test. Most of the planters in Japan are designed on the format from which the use of rice seedlings with roots from which soil particles were not removed or washed away, that is,  referred to seedlings with soil and the planters are classified based on three sub-types. 

·         Seedling-mat type

·         Seedling-band type

·         Seedling-pot type

Seedling-mat type is most popular type been used.  

The seedling-mat is prepared by raising seedlings in a form of rectangular box (58×28cm with 3cm of depth) in which rice seeds are broadcasted containing fine soil. Soil-bands contained in ditches were drilled with seedling-band (2.3 cm depth and 8mm width) of the rectangular seedling box.

CONSTITUTION OF PARTS

Walking type planters are provided with the factors of divisions like engine, main transmission, running part, planting part and operating part. V-belt is used in transmitting power from the engine to the main transmission or it is done directly, also by chain or propeller shaft.

Based on the riding type planters, there are two different classified types:

·         Mounted type (mounted o tractor)

·         Self-propelled type (with its own design).

DIMENSION OF PLANTERS

Dimension ad weight increases in proportion to the number of rows to be planted. Weight of 6-row planter of walking type reaches 200kg without loading seedlings; weight is needed for turning in and out of the planters in the field. Planters with 2-4 rows are handled easily.

ENGINE

Apart from mounted type of riding type planters, air-cooled gasoline engines are used on the basis of output less than 2.5 ps for walking type and 4-6 ps for self-propelled riding type.

WORKING SPEED, EFFECTIVE FIELD CAPACITY

Working rate is good with less number of rows used in planters. Alongside the working rate increased with more rows. Thus the rate and row defined the working capacity of the planter. With more rows, the rate planter working decreased.