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Revenue Recognition (Tables)
 6 Months Ended
Jul. 31, 2022
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue by Geographical Region
The following tables summarize revenue by geographical region (dollars in thousands): 
Three Months Ended July 31,
20222021
AmountPercentage of
Revenue		AmountPercentage of
Revenue
Americas (1)
$120,977 50 %$89,266 46 %
Europe, Middle East, and Africa69,521 29 %60,405 31 %
Asia-Pacific (2)
51,724 21 %45,850 23 %
Total revenue$242,222 100 %$195,521 100 %
(1)Revenue from the United States represented 45% and 42% of our total revenues for the three months ended July 31, 2022 and 2021, respectively.
(2)Revenue from Japan represented 9% and 12% of our total revenues for the three months ended July 31, 2022 and 2021, respectively.
Six Months Ended July 31,
20222021
AmountPercentage of
Revenue		AmountPercentage of
Revenue
Americas (1)
$235,128 48 %$173,892 46 %
Europe, Middle East, and Africa139,124 29 %110,489 29 %
Asia-Pacific (2)
113,036 23 %97,357 25 %
Total revenue$487,288 100 %$381,738 100 %
(1)Revenue from the United States represented 44% and 41% of our total revenues for the six months ended July 31, 2022 and 2021, respectively.
(2)Revenue from Japan represented 11% and 14% of our total revenues for the six months ended July 31, 2022 and 2021, respectively.