function shuffleArray(array) {
    for (let i = array.length - 1; i > 0; i--) {
        const j = Math.floor(Math.random() * (i + 1));
        [array[i], array[j]] = [array[j], array[i]];
    }
    return array;
}
 
function shufflePartial(data) {
    function foo(lst) {
        lst = shuffleArray(lst);
        return lst.map(item => item[0]).concat(lst.findIndex(item => item[1]) + 1);
    }
    return [data[0]].concat(data.slice(1).map(k => {
        const processed = [[k[0]]].concat(k.slice(1, -1).map((item, index) => [item, k[k.length - 1] === index + 1]));
        return [k[0]].concat(foo(processed.slice(1)));
    }));
}
 
// Example usage:
const data = [
    ['Japanese', 'Choice1', 'Choice2', 'Choice3', 'Choice4', 'Answer'],
    ['個人・個々の', 'opposite', 'microscopic', 'individual', 'separate', 3],
    ['必要な', 'necessity', 'necessarily', 'need', 'necessary', 4]
];
 
console.log(shufflePartial(data));
 
 

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