The answer for Round 4 is:
Kageri yuku natsu 翳りゆく夏
This WOWOW drama based on Akai Mihiro's Edogawa Ranpo Award-winning novel was shown in 2015 and featured Watabe Atsuro as the lead. Co-stars included Tokito Saburo, Kadowaki Mugi, Suda Masaki, Iwamatsu Ryo, Takito Kenichi, Maeda Atsuko and Tsuruta Mayu. The photo posted as the question featured a news article about how Tozai Shinbun, a news agency had hired a kidnapper's daughter as a reporter. In the drama, Kadowaki played the role of Asakura Hiroko, the daughter of a man said to be responsible for a kidnapping case 20 years ago. Despite boasting of very fine credentials which should have allowed her to secure the job of a reporter without much issue, her background became a bone of contention thus prompting Kaji Hidekazu (Watabe) to be asked by his company to re-investigate the case.
Here is the leaderboard at the end of Round 4:
AlexAndrA ☆ 玉森
Audrey Lilian Cussoy
And here is the question for Round 5. Please read the dialogue between two characters A and B from a particular scene in a drama and tell me the name of the drama. The English translation is provided along with the Japanese reading and original script for those who can't read Japanese:
A: Shinu no? 死ぬの？(Are you going to die?)
B: Hai. はい。(Yes.)
A: Tsumi no omosa ga tsurakunatta. 罪の重さがつらくなった (Your sin has become too heavy and painful to bear.)
Tsukamatte shikei ni naru yori, jibun de shinu hou ga ii. 捕まって死刑になるより、自分で死ぬ方がいい。(Instead of being caught and sentenced to death, you would rather die on your own.)
Dono michi hametsu suru kara. どの道破滅するから。(Regardless of which path you choose, it's still destruction for you.)
B: Boku ga machigatte nakatta to wakattakara desuyo. 僕が間違ってなかったと分かったらですよ。(I know that I am not wrong.)
A: Watashi ga mitodokete ageru wa, yakusoku doori. 私が見届けてあげるわ、約束どおり。(As promised, I will see that you die.)
B: Dekiru kana? できるかな？(Will you be able to do that?)
UPDATE 1: Looks like Round 5 was extremely easy too based on the number of correct answers I received.
Not sure if the hint will be still be useful but here it goes:
From now till the next hint is revealed, you will earn 3 points.
UPDATE 2: This is the final hint for this round so if you get this correct now, you will earn 1 point: