2261
Companies and individuals in Japan are finding their computers are increasingly targeted by ransomware campaign that bar victims from accessing important files unless they pay money .
 ( ransom: ransomware campaign,  their computers: victim, Japan: place, individuals: victim, Companies: victim) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: phishing, data breach, ransom, discover vulnerability, patch vulnerability, Arguments type: vulnerable system, capabilities, vulnerability, number of victim, issues addressed, compromised data, damage amount, common vulnerabilities and exposures, victim, patch number, number of data, tool, discoverer, time, purpose, place, payment method, releaser, vulnerable system version, attacker, supported platform, patch, price, vulnerable system owner, trusted entity, attack pattern. 
Text: {0} 
Answer:
 ( ransom: ransomware campaign,  their computers: victim, Japan: place, individuals: victim, Companies: victim) 