It's yet another set of Japanese automaker quarterly results announcement guaranteed to make embattled Detroit Big Three CFOs think of jumping overboard: today (Friday 4 August) it was Toyota's turn to announce operating income up 26.5% to 512.4bn yen (helped by 100bn yen in favourable currency rates) and net income up 39.2% to 371.5bn yen for the first quarter of the fiscal year ended 30 June.