This book of reliable prophecy is the Bible. Interestingly, the context of the above-mentioned scripture passage gives a detailed description of things that will lead up to the global calamity. Just as the lava dome and other volcanic indicators gave the Shimabara city officials reasons for designating a danger zone, the Bible gives us reasons for being on the alert and for preparing ourselves for survival. We can learn a lesson from the tragedy at Mount Fugen and discern the gravity of what lies ahead.
Yeah, right.The lesson learned was DON'T STAY IN THE PROXIMITY OF A BUBBLING, ACTIVE VOLCANO!!! No prophecy needed.
OK, I can hang with this example. As far as their "book of reliable prophecy" is concerned, I'm a tad more skeptical. The volcano was active and the people could see, hear and experience its activity. It wasn't some bullshit invisible presence or other "prophesied" stuff. It was real!
If jehooba and jeebus could manifest something proveable (very important) then I think they'd get a better reception. If the Japanese authorities and vulcanologists had relied on innuendo and other bible-type "warnings" instead of telling the locals to "get the hell out!" I'd bet they would have had a lot more than 43 casualties. You can't beat the direct approach.