koyama says the g7 summit in may will prove difficult in addressing the energy crisis. the participants should show solidarity and seek solutions to the global benefit. >> translator: even if countries take measures to reduce their reliance on russia, another global energy crisis can happen anywhere. so it is essential for governments to improve their ability to deal with emergency situations. each country has to set its own policy of course, but international cooperation is even more important. it's crucial to establish and maintain cooperation between producer and consumer countries. >> reporter: koyama says it is important not to repeat the mistakes of the 1970s, when petroleum expoers h an o embao on countes that supported israel. back then, each country pursued its owninrest, ataused illxist toy.raures tt this time, he says we need solidarity and collective action. t tomura keiko, nhk world. >>> okay, let's get a check on the markets. ♪ >>> that's it for "newsline biz" from tokyo. i'm ramin mellegard. thank you very much for watching. witness, on al jazeera. >> rus