Can you maybe summarize/translate?
(my quick summary)
https://skatingjapan.or.jp/image_data/fck/file/2018/180622_FS_Senkokijun.pdf
Selection criteria for 2018-2019 international competitions
1 Worlds (Men/Ladies 3 spots, Pairs/Ice Dance 1 spot)
(1) Men/Ladies
[1] Winner at Nats
[2] 2nd spot goes to a skater selected in a comprehensive way from skaters who meet any of the criteria below
a) Skaters who placed 2nd-3rd at Nats
b) Skaters who placed 1st-2nd of Japanese skaters at the GP final
c) Skaters who placed 1st-3rd of Japanese skaters on ISU world standings at the end of Nats
[3] Including the two skaters selected above, up to three skaters will be selected in a comprehensive way from skaters who meet any of the criteria below
a) Skaters who meet [2]a)-c) but not selected
b) Skaters who place 1st-3rd of Japanese skaters on ISU season's world standings at the end of Nats
c) Skaters who place 1st-3rd of Japanese skaters on ISU season's world best scores at the end of Nats
*Skaters are required to participate in Nats which is the final selection meeting for Worlds. (This requirement does not apply to substitutes.) That said, if the skater placed the 3rd or higher at Worlds in the past, and if the reason is unavoidable such as injuries, there will be a case that the skater can be selected in a comprehensive way by taking it into considerations that the skater's results prior to the injury, for example, are good enough to meet the criteria above. The perspectives of how the skater's condition at Worlds will be are to be taken into the considerations.
(2) Pairs/Ice Dance
Skaters are to be selected in a comprehensive way from the skaters who meet any of the criteria below, and their international competitiveness is to be taken into considerations in the selection process.
a) Winner at Nats
b) Skaters who places 1st-3rd of Japanese skaters on ISU world standings at the end of Nats
c) Skaters who place 1st-3rd of Japanese skaters on ISU season's world standings at the end of Nats
d) Skaters who place 1st-3rd of Japanese skaters on ISU season's world best scores at the end of Nats
*Skaters are required to participate in Nats which is the final selection meeting for Worlds.
1 4CC (Men/Ladies/Pairs/Ice Dance 3 spots)
(1) Men/Ladies
Skaters are to be selected in a comprehensive way at the end of Nats from the skaters who meet any of the criteria below.
a) 1st-10th at Nats
b) 1st-6th on ISU world standings at the end of Nats
c) 1st-6th on ISU season's world standings at the end of Nats
d) 1st-6th on ISU season's best scores at the end of Nats
*Skaters are required to participate in Nats which is the final selection meeting for 4CC. (This requirement does not apply to substitutes.) That said, if the skater placed the 3rd or higher at Worlds in the past, and if the reason is unavoidable such as injuries, there will be a case that the skater can be selected in a comprehensive way by taking it into considerations that the skater's results prior to the injury, for example, are good enough to meet the criteria above. The perspectives of how the skater's condition will be are to be taken into the considerations.
(2) Pairs/Ice Dance
Skaters are to be selected in a comprehensive way from the skaters who have the minimum scores that the federation's figure skating committee require. (Skaters need to receive the scores in competitions that the figure skating committee specify.)
*Skaters are required to participate in Nats which is the final selection meeting for Worlds.
Jr Worlds
(Men 2 spots, Ladies 3, Pairs 2, Ice Dance 1)
Final selection will be decided at the end of Sr Nats.
(1) Men
[1] Jr Nats winner
[2] Including the skater who meets [1], up to 2 skaters will be selected from eligible skaters who meet any of the criteria below
a) Skaters who placed 2nd-3rd at Jr Nats
b) Skaters who skated at the Jr GP final
c) Skaters who placed 1st-3rd of the Jr eligible skaters
d) 1st-3rd of the Jr eligible skaters on ISU season's world rankings at the end of Nats
e) 1st-3rd of the Jr eligible skaters on ISU season's best scores at the end of Nats
(2) Ladies
[1] Jr Nats winner
[2] Including the skater who meets [1], up to 3 skaters will be selected from eligible skaters who meet any of the criteria below
a) Skaters who placed 2nd-3rd at Jr Nats
b) Skaters who skated at the Jr GP final
c) Skaters who placed 1st-3rd of the Jr eligible skaters
d) 1st-3rd of the Jr eligible skaters on ISU season's world rankings at the end of Nats
e) 1st-3rd of the Jr eligible skaters on ISU season's best scores at the end of Nats
Men/Ladies
*Skaters are required to participate in Nats which is the final selection meeting for Worlds. (This requirement does not apply to substitutes.) That said, if the skater placed the 3rd or higher at Jr Worlds in the past, and if the reason is unavoidable such as injuries, there will be a case that the skater can be selected in a comprehensive way by taking it into considerations that the skater's results prior to the injury, for example, are good enough to meet the criteria above. The perspectives of how the skater's condition will be at Jr Worlds are to be taken into considerations.
(3) Pairs/Ice Dance
Skaters are to be selected in a comprehensive way by taking their international competitiveness into considerations.
Skaters need to have minimum scores that the fed's figure skating committee requires. (Skaters need to receive the scores in competitions that the figure skating committee specify.)
*Skaters are required to participate in Nats which is the final selection meeting for Worlds.
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Long and complicated! I'm done. I'll edit this post and add the rest tomorrow. <---(ETA: I gave up!)